A note "Shall meet IPC Class x ,blah blah, except where precluded by original design" doesn't sound like the correct approach to me - it could unintentionally result in the designer not getting vital feedback from the fabricator and assembler.
I think highlighting particular areas on a specific design with a note is better - like holding your hand up to say "look I know this is going to be an issue here but spent time looking at it and I've ruled out every alternative".
As I designer I want to know if I've caused an issue and have the chance to rectify it.
Regards,
James
James Head BEng CID+ MIIE MIET
Senior PCB CAD Engineer
Crowcon Detection Instruments Limited
172 Brook Drive
Milton Park
OX14 4SD
Telephone: +44 (1235) 557700 ext. 7885
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