Cancellation of a contract or policy of insurance issued under authority of the Act will not become effective otherwise than as provided by 33 U.S.C. 936(b); 30 days before such cancellation is intended to be effective, notice of a proposed cancellation must be given to the district director and the employer in accordance with the provisions of 33 U.S.C. 912(c). The notice requirements of 33 U.S.C. 912(c) will be considered met when:

(a) Notice to the district director is given by a method specified in § 702.101(a) of this chapter or in the same manner that reports of issuance of policies and endorsements are reported under § 703.116; and

(b) Notice to the employer is given by a method specified in § 702.101(b) of this chapter.