1.1 This Circular provides guidance material on the requirements for the acceptance, issue and applicability of the following Mandatory Directives:
a) Airworthiness Directives
b) Mandatory Permit Directives
c) State of Type Design Directives
d) State of Type Certificate Directives
1.2 Also included is guidance material on Alternative Methods of Compliance to existing Airworthiness Directives and Permit Directives.