The crew requirements for ships registered in FAS shall be in accordance with SOLAS, Chapter 5, Regulation 14. The requirements for qualifications of the crews are set in accordance with the convention on Standards of Training, Certification and Watchkeeping (STCW).
There are no requirements of nationality to the captain or any of the crew members, if only their certificates are recognised pursuant to the STCW convention and an agreement is in effect between Denmark/Faroe Islands and the respective Flag State Party.
Read everything about Faroese recognition of foreign certificates here.
When you apply for a Minimum Safe Manning Certificate, you fill out a form that can be found on the Faroese Maritime Authority's website and return it to the FMA.