Section 13.609 - Requirements to qualify for an STCW endorsement for basic oil and chemical tanker cargo operations(a) Every applicant for an endorsement in basic oil and chemical tanker operations must: (1) Qualify for a national endorsement as tankerman-assistant dangerous liquid; and(2) Provide evidence of meeting the standards of competence identified in Table A-V/1-1-1 of the STCW Code (incorporated by reference, see § 13.103 of this part).(b)Grandfathering. Seafarers holding a valid tankerman-assistant dangerous liquid or tankerman-engineer endorsement issued prior to March 24, 2014 will be issued an STCW endorsement for basic oil and chemical tanker cargo operations without meeting the requirements of paragraph (a) of this section. After March 24, 2014, all seafarers applying for an original endorsement in basic oil and chemical tanker operations must meet the requirements of this section.