Foreign investment in travel agency, tour operators, car rental and maountain climbing and trekking tour operators is prohibited.
"2. In this Act, unless the context requires otherwise -[...]
"tourism facility" means a place, thing or premises managed by a tourism operator and which regularly or occasionally provides services or products for utilization by tourists or visitors for purposes other than exercise of an activity remunerated from within the place visited;[...]
"tourism operator" as used in this Act, means a tourist agent or photographic safaris operator or any person who for reward conduct an activity or operate a facility, or undertakes to provide services for tourists and other members of the public in relation to tours and travel within or outside the country;
[...]
58.-( 1) The Minister may specify facilities and activities which can only be operated by Tanzanian citizens, and put in place mechanism on how tourism facilities and activities can benefit local communities surrounding the same.
(2) Without prejudice to subsection (1 ), no person who is not a Tanzanian citizen shall engage himself in a business of:
(a) save for foreign airlines, travel agency; (b) mountain climbing or trekking; (c) tourguide; (d) car rental; or ( e) any other activity the Minister may, by order published in the Gazette, specify.
(3) Subsections ( 1) and (2) shall not be construed as to prohibit any foreign tour leader to accompany or lead any foreign tourist or group of foreign tourists visiting Mainland Tanzania. [...]" (THE TOURISM ACT, 2008)
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"5.(1) An application for the registration of any tourism agent business by a body corporate shall be in the prescribed form and be accompanied with the following: [...]
(2) NOtwithstanding the provision of sub-regulation (1), a tour operator who is a citizen of the United Republic shall also submit the following particulars-
(a) proof of having a fleet of not less than three four wheel drive vehicles whereby, within twenty four months, the number of cars shall be raised up to five or more whic are: (i) suitable for carrying tourists and whose ground clearance is not less than 200mm  [...]
() where the application for tour operator is made by non-citizen, the provision of sub-regulation (1) shall apply together with the following-
(i) proof of having a fleet of new vehicles not less than ten of the type indicated in regulation 5(2)(i) [...]
(3) For the purpose of sub-regulation (2) and (3), "citizen" in case of a limited liability company means a company in which more than 50% of its subscribed shares are owned by a single citizen of the United Republic of Tanzania[...]
(6) Without prejudice to section 58(2) of the [Tourism] Act, an application for registration of the business of travel agent, mountain climbing or trekking and car rental shall be done by citizens of Tanzania and, in case of limited liability company, the shares must be fully owned by a citizen.[...]" (Tourism Agents (Registration and Licensing) Regulations, 2015)

THE TOURISM ACT, 2008
Tourism Agents (Registration and Licensing) Regulations, 2015
[<a href="http://extwprlegs1.fao.org/docs/pdf/tan85329.pdf">Act</a>],[<a href="https://www.maliasili.go.tz/uploads/TOURISM_AGENTS_%28Registration_and_Licensing%290001.pdf">Reg</a>]