Regulation (EU) No 1321/2014
An application for the issue or change of an approval shall be made to the competent authority in a form and manner established by such authority.
AMC 145.A.15 Application
ED Decision 2015/029/R
In a form and in a manner established by the competent authority means that the application should be made on an EASA Form 2 (refer to Appendix III to AMC to Part-145).