The PBGC applies the rules in subpart B of part 4000 of this chapter to determine permissible methods of issuance under this subpart. The PBGC applies the rules in subpart C of part 4000 of this chapter to determine the date that an issuance under this subpart was provided. The PBGC applies the rules in subpart D of part 4000 of this chapter to compute any time period for issuances to third parties under this subpart.