Bell Helicopter logos and trademarks may not be used without written permission from Bell that is specific to a particular use. The use of Bell logos and trademarks is controlled by guidelines that protect the good will represented by Bell's worldwide trademarks. This includes, but is not limited to, controlling the use of Bell's trademarks on approved service facility documents such as business cards, letterheads, signage and advertisements. Bell reserves the right to approve/disapprove each use of its logos or trademarks on a case by case basis
...Regarding our Customer Service Facilities:
Specifically, we do not approve the use of the company logo within another business use or on business cards other than to state: "Bell Helicopter Textron Inc. Approved Customer Service Facility ". The use of the Bell logo in an advertisement should be used well apart from the "CSF" logo and include the phrase "Approved Customer Service Facility" clearly associated with the logo.
These guidelines are general in nature. All proposed uses of any of Bell's trademarks should be submitted to Bell Helicopter Textron Inc.'s Communications department for approval.