MMCs issued to individuals obtaining sea service as part of an approved training curriculum while enrolled at either the United States Merchant Marine Academy or a deck or engineering class of a Maritime Academy approved by and conducted under the rules prescribed by the Maritime Administrator and listed in 46 CFR part 310 will include an endorsement of Cadet-Deck or Cadet-Engine, as appropriate, and Lifeboat Operator. Individuals obtaining sea service as part of such an approved training curriculum must do so in the capacity of Cadet-Deck or Cadet-Engine, as appropriate, notwithstanding any other rating endorsements the individual may hold or any other capacity in which the individual may have previously served.