Indeed, councils are able to produce event patches. In every case,
however, these event patches are "temporary" patches and are to be
worn on the right pocket. Only one "temporary" patch should be worn
at one time. Ever notice how any Scouts and Scouters wear the
Philmont patch in this position?
With respect to National Jamboree patches, council shoulder patches
are designed under specific guidelines. They can and do represent
the Council and are authorize for wear after the Jamboree. In this
situation only, two Jambo patches may be worn at the same time, one
above the pocket as directed in Jamboree rules, and on on the pocket.
Troop numbers for Jamboree Scouts are assigned by National, and each
delegate is required to wear that specific number for recognition
during Jambo. They should not replace the home unit number.
"Clause 11: SPECIAL LOCAL BADGES AND INSIGNIA
Local councils are authorized to adopt special badges and insignia
as awards for particular purposes in harmony with national policies
and to permit their use upon the official uniform in accordance with
the Rules and Regulations of the Corporation, bur such awards must be
approved as to purpose and design by the Corporation in advance."
Where the "bending" occurs is that these special badges and insignia
generally are approved by a professional scout within the council.
In some cases, even that step is skipped.
427, Old Hickory Council