Singapore legislation
Regulation 11
of Air Navigation (119 — Air Operator Certification) Regulations 2018
Regulation 11
Fleet composition requirements
Subregulation 1
Subject to paragraph (2), the number of foreign registered aircraft operated by an AOC holder must not at any time exceed 25% of the total number of aircraft operated by the AOC holder (rounded up to a whole number).
Subregulation 2
Unless the Director‑General of Civil Aviation otherwise permits, an AOC holder must —
(a)
operate at least one Singapore registered aircraft for each aircraft type operated; and
(b)
have management and operational control of at least one Singapore registered aircraft at all times.