An applicant seeking renewal of a tankerman endorsement or an STCW endorsement valid for service on tank vessels must meet the requirements of § 10.227 of this subchapter, except § 10.227(e)(1), for renewing an MMC and meet the following additional requirements:

(a) For endorsements as tankerman-PIC, advanced oil and chemical tanker cargo operation; and advanced liquefied gas tanker cargo operations, present evidence of—

(1) At least 90 days of service during the preceding 5 years onboard a tank vessel for which the endorsement is valid, performing duties appropriate to the tankerman endorsement held; and participation in at least two transfers of liquid cargo in bulk of the type for which the endorsement is valid within the preceding 5 years; or

(2) Completion of an approved course for Tankship: Dangerous Liquids or Tankship: Liquefied Gases, appropriate for the endorsement to be renewed, within the previous 5 years.

(b) For endorsements as tankerman-assistant, basic oil and chemical tanker cargo operation; and basic liquefied gas tanker cargo operations, present evidence of—

(1) At least 90 days of service during the preceding 5 years onboard a tank vessel for which the endorsement is valid, performing duties appropriate to the tankerman endorsement held; or

(2) Completion of an approved course for Tankship: Dangerous Liquids or Tankship: Liquefied Gases, appropriate for the endorsement to be renewed, within the previous 5 years.

(c) For endorsements as tankerman-PIC (Barge), present evidence of—

(1) Participation in at least two transfers of liquid cargo in bulk of the type for which the endorsement is valid, within the preceding 5 years; or

(2) Completion of a course approved for this purpose, appropriate for the endorsement to be renewed, within the previous 5 years.

(d) For endorsements as tankerman-engineer, present evidence of—

(1) At least 90 days of service during the preceding 5 years onboard a tank vessel for which the endorsement is valid, performing duties appropriate to the tankerman endorsement held; or

(2) Completion of a course approved for this purpose, appropriate for the endorsement to be renewed, within the previous 5 years.