Thanks Hoistop,
As you mentioned, covering all aspects of SB's/AD's wether they are FAA/ENAC/EASA/CAA/TCAD is fine, to some point this covers the maintenance company, but when the engineer signs out the release cert and has fitted a Bell Part that has not gone through the Agusta hands, this is then going against the TCDS and therefore is classed as a bogus part and risking the approval of the company.
Some authorities have agreed with this practice, to cover all ad's/sb's, but ask them to put it in writing !!!
Please, if anyone can give assistance with this matter, please drop me an email.