And just be careful because it CAN be airline specific
Generally, such will be the case.
The MMEL must be tailored to suit the operator and then processed through whatever regulatory approval process applies in the particular jurisdiction.
Sometimes the regulator will help out - developing an MEL is a painful exercise - as, for instance, in Australia where, for a period, CASA developed a generalised MEL (GMEL) for given Types which the operator could purchase for a fee much more attractive than the cost of a do-it-yourself animal. The GMEL system fell into disuse for reasons I have never discovered ..
Having had some involvement in MEL (and GMEL) development and defect investigation, I can only shake my head at the philosophy that holds a flight starts prior to takeoff ..