Originally Posted by DanH
Wee detail (of which I'm sure Mel is aware); Many of the older operating limitations out there (like those issued in the 90's for example) included a requirement to inform the FAA and receive a response prior to resuming flight after a "major change". Most assumed it meant a letter to your local FSDO (and a wait for a written response), but there was confusion/variation all around. The provision was removed from later wording, but if it is in yours, well, as Mel said....just follow your operating limitations.
As Dan says, op lims have changed over time. Regardless of when yours were issued, they are the controlling document. If you prefer a later version, then you must have yours amended. Until that time, you are bound to the op lims issued to your aircraft.
Is that confusing enough?