On 28 February 2020, an Emergency Ordinance amending the Petroleum Law (No. 238/2004) entered into force. The amendment empowers the competent authority to refuse, for reasons of national security, the concession and execution of oil operations for the exploration, development and exploitation of an oil field by legal persons which are effectively controlled by non-EU nationals or entities. Additionally, any transfer of a concession is subject to government approval.
"Article 1 [...]
(2) Petroleum represents combustible mineral substances consisting of mixtures of natural hydrocarbons, accumulated in the earth's crust and which, on surface conditions, are gaseous, in the form of natural gas, or liquid, in the form of crude oil and condensate.
[...]
Article 2
For the purposes of this law, the terms and expressions used are defined as follows: [...]
24. oil operations means the set of activities of exploration, development, exploitation and abandonment of an oil field, underground storage, transport and transit of oil on main pipelines, as well as the operation of oil terminals;
[...]
Article 3
Petroleum operations are carried out by legal entities, Romanian or foreign, in accordance with the law, only within certain perimeters established for this purpose by the competent authority.
Article 3^1
1. The competent authority may refuse, for reasons of national security, the concession and execution of oil operations for the exploration, development and exploitation of an oil field by legal persons which are effectively controlled by third countries of the European Union or third-country nationals. European.
(2) In the case of oil agreements in force, on the proposal of the competent authority, for reasons of national security, a unilateral termination of the oil agreement may be approved by a Government decision.
(on 28-02-2020, Chapter I was supplemented by Point 1, Article I of the EMERGENCY ORDINANCE no. 27 of 4 February 2020, published in the OFFICIAL GAZETTE no. 161 of 27 February 2020) 
[...]
Article 34
(1) The holder of an oil agreement may transfer to another legal person the acquired rights and obligations assumed, only after approval, by a decision of the Government, at the proposal of the competent authority.
(on 28-02-2020, Paragraph 1 of Article 34, Chapter IV was amended by Point 2, Article I of EMERGENCY ORDINANCE No. 27 of 4 February 2020, published in the OFFICIAL GAZETTE No. 161 of 27 February 2020)[...]" (Petroleum Law (No. 238 of 7 June 2004), as amended by Emergency Ordinance No. 27 of 4 February 2020, Articles 1, 2, 3, 3^1 and 34 [google translation])
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"Article 1 [...]
(2) Petroleum represents the combustible mineral substances consisting of mixtures of natural hydrocarbons, accumulated in the earth's crust and which, under surface conditions, appear in a gaseous state, in the form of natural gas, or liquid, in the form of crude oil and condensate.
[...]
Article 2
For the purposes of this law, the terms and expressions used are defined as follows: [...]
3. the competent authority is the National Agency for Mineral Resources, which represents the interests of the state in the field of oil resources, according to the attributions established by this law; [...]
24. oil operations means the set of activities of exploration, development, exploitation and abandonment of an oil field, underground storage, transportation and transit of oil on main pipelines, as well as the operation of oil terminals;
[...]
Article 3
Petroleum operations are carried out by legal entities, Romanian or foreign, under the law, only within certain perimeters established for this purpose by the competent authority. [...]" (Petroleum Law (No. 238 of 7 June 2004), as amended by Emergency Ordinance No. 40 of 28 June 2018, Articles 1, 2, and 3 [google translation])
Petroleum Law (No. 238 of 7 June 2004), as amended by Emergency Ordinance No. 27 of 4 February 2020
Petroleum Law (No. 238 of 7 June 2004), as amended by Emergency Ordinance No. 40 of 28 June 2018
[<a href="http://legislatie.just.ro/Public/DetaliiDocument/52681">Law</a>],[<a href="https://legislatie.just.ro/Public/DetaliiDocument/179761">Law</a>]