The ASM that declares Interrupts, will be OK because all the GOTO's and GOSUB's/CALLs in DT_INTS already use Paging code.

If the ISR is assembly language, there would be a possibility of page problems.
But if you use L?GOTO or L?CALL instead of goto or call, then it won't be a problem either.
They are macro's that are part of PBP and automatically set PCLATH to the correct page before jumping. They also reset to BANK0, so anywhere they jump to should assume the bank is currently 0.

The -306 line can technically be put anywhere in the program before the first Page Crossing. But it's usually found at the very top, right up there with your __CONFIG lines.
<br>