29 CFR 101.27 : Labor (§ 0.735-1 To Parts 4908-4999) — (§ 100.101 To Parts 472-499) — Regulations Relating To Labor (§ 100.101 To Parts 472-499) — National Labor Relations Board (§ 100.101 To Parts 105-199) — Statements Of Procedures (§ 101.1 To § 101.43) — Referendum Cases Under Section 9(E) (1) And (2) Of The Act (§ 101.26 To § 101.30) — Investigation of petition; withdrawals and dismissals.