Only Tanzanian vessels may be engaged in fishing activites in Tanzania's territorial water and in its Exclusive Economic Zone, unless exceptionally authorised by the Minister; registration of a Tanzanian fishing vessel is reserved to Tanzanian nationals, individuals or corporations owning ships hired out on bareboat charters to nationals of Tanzania, and individuals or corporations in bona fide joint venture shipping enterprise relationships with nationals of Tanzania.
"'2. For the purpose of this Act unless the context requires otherwise-[...]
'foreign fishing vessel'' means a fishing vessel which is not registered in the United Republic of Tanzania and does not fly the flag of United Republic of Tanzania;
[...]
Prohibition of foreign fishing in territorial water
19. No foreign fishing vessel shall be licensed to fish in the territorial waters.
20.-(1) Notwithstanding the provisions of section 19, the Director or any authorized officer shall for purposes of scientific research, complementary's educational and food supply with the consent in writing of the Minister, grant any fishing licence or to fish authority, as the case may be, to any person who is not a citizen of the United Republic, or, in the case of a body corporate, to any body corporate which is not incorporated by or under any written law. 
Licensing of foreigners
(2) in case of a fishing vessel flying a foreign flag, such vessel shall not change her foreign flag unless the Registrar of Ships has consulted the Director on the same.[...]" (FISHERIES ACT, 2003)
--------------
(c) Foreign Fishing Vessels and Fisheries Access
46.-(1) Unless otherwise provided in this Act, no foreign fishing vessel shall be used for fishing or related activities in the Exclusive Economic Zone except under and in accordance with an applicable fisheries access agreement, licence or other permission for activities within the scope of this Act.[...]
47.-(1) The foreign fishing vessels may be used in the Exclusive Economic Zone for fishing or related activities subject to a written agreement made in accordance with this Act, any applicable Fisheries Management Plan, international agreement, fisheries management agreement and national policy or strategy, and subject to stated terms and conditions.
49.-(1) No agreement governing joint ventures or the chartering of any foreign fishing vessel for fishing or fishing related activities within or beyond the Exclusive Economic Zone, whether or not it involves changing the registration of the vessel, shall be valid unless it is approved by the Ministers on the advice of the Director General.
(2) A joint venture or charter agreement may be approved if the following requirements are fully met:
(a) a charter agreement vests operational control of the foreign fishing vessel to a Tanzanian citizen, resident or registered company;
(b) the joint venture or charter agreement provides clearly identifiable benefits with no adverse effects to the United Republic, its fisheries or its marine environment, including: (i) development of the Tanzanian fishing industry; (ii) training of Tanzanian citizens; (iii) foreign exchange earnings for the United Republic; (iv) investment in the United Republic; (c) the joint venture, charter agreement, right or vessel approved under this Act shall:
(i) be registered in Mainland Tanzania or Tanzania Zanzibar; [...]" (Deep Sea Fisheries Management and Development Act, 2020)
--------------
"Part III -  Qualification and entitlement for registration [...]
6.(1). Subject to regulation 27(4) a ship shall be entitled to be registered if a majority interest in the ship is owned by one or more persons qualified to be owners of Tanzanian ships.
(2) For the purposes of sub-regulation (1)-
(a) one or more persons shall be treated as owning a majority interest in a ship if there is vested in that person or in those persons, taken together, the legal title to 33 or more shares; and
(b) a body corporate shall be treated as resident in the United Republic of Tanzania if it has a place of business in  the United Republic of Tanzania.
(3) The owner of such ship shall fulfull the following:
(a) all ratings engaged on board of the ship shall be Tanzanian;
[...]
Part IV -  Qualification and entitlement of fishing vessels to be registered
7.(1) The following persons are qualified to be owners of fishing vessels which are to be registered:
(a) national of Tanzania;
(b) individuals or corporations owning ships hired out on bareboat charters to nationals of Tanzania; 
(c) individuals or corporations in bona fide joint venture shipping enterprise relationships with nationals of Tanzania as may be prescribed;
(2) Subject to Regulations 8 and 27(2), (3) and (4), a ship shall be entitled to be registered only if the legal and beneficial title of the vessel are vested wholly in one or more of those persons qualified to be owners of a Tanzanian fishing vessel by virtue fo Regulation 7(1).
8.(1) Notwithstanding that the requirements specified in Regulation 7(2) are satisfied a vessel shall not be registered unless:
(a) it is managed, and its operations controlled and directed, from within the United Republic of Tanzania;
(b) any charterer, manager or operator of the vessel is a person qualified to be the owner of a Tanzanian fishing vessel by virtue of Regulation 7(1)[...]" (Merchant Shipping (Registration of Ships and Lincensing of Vessels) Regulations, 2005)
FISHERIES ACT, 2003
Deep Sea Fisheries Management and Development Act, 2020
Merchant Shipping (Registration of Ships and Lincensing of Vessels) Regulations, 2005
[<a href="http://extwprlegs1.fao.org/docs/pdf/tan53024.pdf">Act</a>],[<a href="http://extwprlegs1.fao.org/docs/pdf/tan199110.pdf">Act</a>],[<a href="https://www.tasac.go.tz/uploads/publications/sw1627210182-Merchant%20Shipping%20(Registration%20of%20Ships)%20Regulations,%202005.pdf">Reg</a>]