CR2
Not so fast, ICAO Annex 6 came into effect on Nov 18th, it recommends all operators of large planes to have a MEL, Ops Manual, SMS and maintenance program. IS-BAO registration is probably the regulatory means of compliance, but review the Fox Harbor GLEX accident in Canada and the fallout from it.
AC 125-1 is available at the FAA regulatory website, if interested. Pretty well covers 125 ops
GF