46 CFR § 16.220 - Periodic testing requirements.
(1) An original issuance of a license, COR, MMD, or MMC;
(3) A raise of grade of a license or COR;
(5) A reissuance of a credential with a new expiration date. The applicant must provide the results of the test to the Coast Guard Regional Examination Center (REC) at the time of submitting an application. The test results must be completed and dated not more than 185 days before submission of the application.
(b) Unless excepted under paragraph (c) of this section, each pilot required by this subchapter to receive an annual physical examination must pass a chemical test for dangerous drugs as a part of that examination, and provide the results to the Coast Guard. Applicants need not submit additional copies of their annual chemical test for dangerous drugs pursuant to paragraph (a) of this section if the applicant submitted passing results of a chemical test for dangerous drugs to the Coast Guard within 12 months of the date of application.
(c) An applicant need not submit evidence of passing a chemical test for dangerous drugs required by paragraph (a) or (b) of this section if he or she provides satisfactory evidence that he or she has -
(2) During the previous 185 days been subject to a random testing program required by § 16.230 for at least 60 days and did not fail or refuse to participate in a chemical test for dangerous drugs required by this part.
(d) Except as provided by paragraph (b) of this section, an applicant is required to provide the results of only one chemical test for dangerous drugs when multiple transactions are covered by or requested in a single application.