For aircraft less than 15 years since build at 15 August 1996:
Initial completion of tasks defined in the Requirement Document for each aircraft area must occur in a period not exceeding the interval established in the Requirement Document, beginning at no later than 15 August 1997; or at the implementation age specified in the Requirement Document; whichever occurs last. Thereafter at intervals not to exceed those specified in the Requirement Document.
For aircraft greater than 15 years since build at 15 August 1996:
Initial completion of all tasks defined in the Requirement Document must be completed within the four years following 15 August 1997, or within the periods specified in the Requirement document; whichever occurs first. Thereafter at intervals not to exceed those specified in the Requirement Document.