13 C.F.R. § 142.20
How are papers served?
Except for service of a complaint or a notice of hearing under §§ 142.11 and 142.14(b) respectively, service of papers must be made as prescribed by § 134.204 of this chapter.
Except for service of a complaint or a notice of hearing under §§ 142.11 and 142.14(b) respectively, service of papers must be made as prescribed by § 134.204 of this chapter.