Any applicant who has successfully complete QMED-Oiler (MARINS-387) within one year of application will satisfy: The examination requirements of 46 CFR 12.501(c)(5) for a national rating endorsement as QMED-Oiler; AND Receive a total of 33 days sea service required for endorsement as QMED-Oiler PROVIDED that the applicant furnishes further evidence of an additional 147 days approved sea service as required by 46 CFR 12.503(a).A certificate may be used for one application which results in the issuance of an endorsement and may not be used for any application transactions thereafter.