Transactions related to the acquisition of coal mining rights by foreign natural or legal persons are subject to prior approval. Likewise, change of control of a concessionaire holding hydrocarbons prospecting, exploration and/or exploitation rights, from EU to non­EU controlling countries or nationals (either directly or indirectly), is not allowed without the prior consent of the Ministerial Council. Non­EU nationals (whether natural or legal persons) may be granted hydrocarbons prospecting, exploration and exploitation rights as long as the principle of reciprocity with the country of origin applies. However, the Ministerial Council may refuse the granting or the transfer of such rights to to any entity which is effectively controlled by a third country or third country nationals on grounds of national security.

"Article 1 - Minerals
For the application of the present mineral materials, as they are found in nature, are legally distinguished into Mineral minerals or ores and Quarry minerals.
Article 2 - Mineral minerals
1. The following minerals are considered as Mineral minerals or ores:
a) The metals in their natural state (such as copper, gold, etc.).
b) The compounds of all metals (such as aluminum, silver, arsenic, antimony, vanadium, barium, bis, tungsten, potassium, zirconium, cadmium, tin, cobalt, platinum, manganese, magnesium, magnesium, molybdenum, molybdenum, molybdenum , mercury, copper, gold, chromium, zinc, etc.).
c) The minerals of the metals of the group of rare earths.
d) The minerals of the radioactive elements.
e) Natural sulfur, graphite, phosphorite, fluorite, asbestos, talc, alunite, mica, astrium, alum, sodium chloride, compounds, boron, bromine, iodine , dolomite with a magnesium oxide content greater than 21%.
f) The precious stones.
g) Solid fuels and fossil fuels, including peat (coal).
h) The natural deposits of organic fertilizers.
i) Hydrocarbons of all kinds in solid liquids or gaseous states, as well as their oxidation products (ozocerite, asphalt, bitumen, bituminous limestones and shales, etc.).
j) Resinous mineral materials.
k) The gaseous sun and the native gases.
l) the geothermal potential
[...]
Article 8 - Acquisition by foreigners
1. The drawing up of any contract which has as its object the transfer of mining rights to foreign natural or legal persons in general or the granting of the use and exercise of such rights in their favor requires, prior to its conclusion and on the penalty of absolute invalidity, the prior approval of the Minister of Industry subject to the provisions of Articles 74, 75, 76 and 77 hereof.
2. Prior approval of the Council of Ministers, on the proposal of the Minister of Industry, is also required for the acquisition of shares of domestic companies, acquired in general mining rights, by persons referred to in paragraph 1 of this article.
3. The approval of the Council of Ministers is not required for the preparation of pre-contracts referred to in paragraph 1 of this Article, provided that such pre-agreements shall include a clause in which the final contracts are subject to the condition of their prior approval of the the Council of Ministers.
4. In case of compulsory auction of mines, regardless of the region in which they are not located, foreigners, natural or legal persons, may bid only if they submit to the auctioneer the approval of the Council of Ministers under paragraph 1 of this article.
[...]
Article 11
For the application of the provisions of articles 8 and 9 of this company, acquired legal personality or other legal entities having their registered office in the country, are considered foreigners, if at the discretion of the "Minister of Development" they are under legal or financial dependence or influence of foreigners. taking into account the nationality of the majority of its shareholders, the nationality of the company's capital and other critical data in each specific case.  
Article 12
Foreign, natural or legal persons bearing shares of Societes Anonymes acquired rights to mines, may not, during the dissolution of the Company and distribution of corporate property, acquire rights over the mines of the dissolved Societe Anonyme, without the prior approval of the Deputy Minister.[...]" (Mining Code (210/1973), last amended by Law 4512/2018, Articles 1, 2, 8, 11 and 13 [google translation based on unofficial text at kodiko.gr])
-----------------------------------------
"CHAPTER AND
EXERCISE OF PUBLIC RIGHTS
Article 1 - Definitions
For the application of the provisions of this law are defined as:
1. Hydrocarbons: all kinds of mineral petroleum in solid, liquid or gaseous state and in particular crude oil, natural gas, as well as all kinds of minerals or substances that are extracted with them from porous and permeable geological formations. Shale oil and shale gas are not included. [...]
6. Lessor: The State on whose behalf EDEY SA enters into a lease agreement with third parties.
7. Employer: The State on whose behalf EDEY SA enters into a production distribution contract with third parties.
8. Contractor: The one who concludes a lease contract or a production distribution contract with EDEY SA, as well as the licensee in accordance with paragraphs 4 to 8 of article 7 of this.
9. Associate: Company or other legal entity or natural person, directly or indirectly controlled by the Contractor, as well as any company or other legal or natural person, which is controlled or controlled directly or indirectly by a company or legal or natural person, which is controlled or controlled directly or indirectly by the Contractor. A person is considered to have control of a company, when he holds at least thirty percent (30%) of the voting capital or when he has, according to special provisions, the right to appoint the management of the company. Especially for the application of par. 5 of article 7 of the present, as a control of the company is considered the participation in its capital in percentages bigger than fifty percent (50%).
[...]
Article 4 - Contractors
1 . The contractors, concluded in accordance with the provisions hereof, may be natural and legal persons, alone or more than one in the form of a consortium, provided that they are nationals of a Member State of the European Union or of a third country, subject to reciprocity. 
2 . By decision of the Council of Ministers, upon the recommendation of the Minister of Industry, Energy and Technology, participation in the procedures of Articles 2 and 3 and the granting of a search permit or the conclusion of contracts for the lease or distribution of production and the transfer of these rights may be prohibited. according to paragraphs 4 to 8 of article 7 of this law, to a person who is substantially controlled by a third country or by third country nationals or to a consortium in which such person participates, for reasons of national security. 
3. After the conclusion of the contract, the Contractor is prohibited from coming under the direct or indirect control of a foreign state that is not a member of the European Union or under the direct or indirect control of a national of such state, without prior approval of the Council of Ministers, which decides after an opinion. of the Minister of Industry, Energy and Technology. Violation of the previous provision entails the reduction of the Contractor by a decision of the Council of Ministers. [...]" (Law no. 2289/95 "Exploration, exploration and exploitation of hydrocarbons and other provisions" [google translation])
-----------------------------------------
"CHAPTER B SEPARATION OF GAS TRANSMISSION SYSTEMS
Article 61 - Gas Transmission System Operators
1. Every company that owns the Natural Gas Transmission System, exercises the responsibilities of the administrator of that System in accordance with the provisions of this law.
2. Exceptions to the provisions of Part Three of this Law may be granted for a specified period of time under the terms and conditions of Article 36 of Directive 2009/73 / EC, as specifically provided for in Article 76, or derogations under the terms and conditions of paragraphs 4 and 5 of Article 49 of Directive 2009/73 / EC.
Article 62 - Separate System Operators Gas Transmission (Article 9 of Directive 2009/73 / EC)
1. In order to exercise the responsibilities of a Natural Gas Transmission System Operator, the following conditions must be cumulatively met: [...]
3. The obligation set out in Article 61 (1) shall be deemed to be fulfilled where two or more undertakings in the possession of Gas Transmission Systems have set up a consortium acting as a Transmission System Operator in two or more Member States for these Gas Transmission Systems. No other undertaking may participate in the consortium unless it has been approved in accordance with Article 14 of Directive 2009/73 / EC as an independent system operator or has been certified as an independent transmission operator for the purposes of Chapter IV of Directive 2009/73/EC.
[...]
CHAPTER D - INDEPENDENT GAS SYSTEMS
Article 74 - ASFA License
1. Right of construction and ownership or, in case of an underground Storage Facility, the holders of ASFA License have the right to use the ASFA. The ASFA License is granted only to legal entities by decision of RAE and in case the License grants the right to build and own transmission systems only to companies falling under Article 1 of Directive 2009/101 / EC, in accordance with the provisions of the License Regulation. [...]
(e) In the event that the License grants the right to build and own Gas Transmission Systems, to meet the criteria of paragraph 1 of Article 61 and Article 62. [...]" (Law 4001/2011 "On the operation of Energy Markets for Electricity and Natural Gas, for Research, Production and Hydrocarbon transmission networks and other regulations" [google translation])
Mining Code (210/1973), last amended by Law 4512/2018, Articles 1, 2, 8, 11 and 13
Law no. 2289/95 "Exploration, exploration and exploitation of hydrocarbons and other provisions" [google translation]
Law 4001/2011 "On the operation of Energy Markets for Electricity and Natural Gas, for Research, Production and Hydrocarbon transmission networks and other regulations" [google translation]
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