Singapore legislation
Regulation 18
of Air Navigation (98 — Special Operations) Regulations 2018
Regulation 18
Height‑keeping performance monitoring
Subregulation 1
A Singapore operator with a special operations approval to conduct RVSM operations must have a programme to monitor the height‑keeping performance of the aeroplanes used for such operations.
Subregulation 2
For the programme required in paragraph (1), the aeroplanes used for such operations must be grouped by the Singapore operator into 2 groups based on aeroplane type.
Subregulation 3
For each group mentioned in paragraph (2), the Singapore operator must monitor the height‑keeping performance of —
where the group consists of only one aeroplane — that aeroplane; or
where the group consists of 2 or more aeroplanes — at least 2 aeroplanes,at least once every 2 years or every 1,000 flight hours, whichever period is longer.