Foreign key personnel (captain of the vessel) needs to be citizens of the Republic of Belarus.
"CHAPTER 6 - SHIP CREW [...]
Section 41. Requirements for crew members [...]
The crew of the vessel, in addition to citizens of the Republic of Belarus, may include foreign citizens, as well as stateless persons.
Only the citizens of the Republic of Belarus can hold the positions of captain (commander), senior assistant captain (commander), senior mechanic and radio specialists on a ship. The conditions under which foreign citizens and stateless persons may be included in the crew of the vessel are determined by the republican government in the field of inland water transport. [...]" (CODE OF INLAND WATER TRANSPORT OF THE REPUBLIC OF BELARUS June 24, 2002 No. 118-Z [google translated])
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SECTION III - SHIP CREW. SHIP CAPTAIN
CHAPTER 7 - SHIP CREW [...]
Article 51. Citizenship of the crew
The crew of the vessel, along with citizens of the Republic of Belarus, may include foreign citizens, as well as stateless persons.
Only the citizens of the Republic of Belarus may hold the positions of ship's captain, senior assistant to the ship's captain, senior mechanic and radio specialist, unless otherwise provided by the legislation of the Republic of Belarus.[...]" (CODE OF MERCHANT SHIPPING OF THE REPUBLIC OF BELARUS November 15, 1999 No. 321-Z [google translated])
CODE OF INLAND WATER TRANSPORT OF THE REPUBLIC OF BELARUS June 24, 2002 No. 118-Z [google translated]
CODE OF MERCHANT SHIPPING OF THE REPUBLIC OF BELARUS November 15, 1999 No. 321-Z [google translated]
[<a href="http://etalonline.by/document/?regnum=hk0200118">Code</a>],[<a href="http://etalonline.by/document/?regnum=hk9900321">Code</a>]