CFR › Title 47 › Part 90 › §90.62747 CFR §90.627Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗Copy link(a)The maximum number of frequency pairs that may be assigned at any one time for the operation of a trunked radio system is twenty, except as specified in § 90.621(a)(1)(iv).(b)[Reserved]