Byddai hefyd yn ofynnol i gynghorau weithio'n rhanbarthol ar wasanaethau eraill fel gwella addysg, gwasanaethau cymdeithasol, anghenion dysgu ychwanegol ac agweddau eraill ar gynllunio defnydd tir, ond byddai ganddynt fwy o hyblygrwydd o ran sut y byddant yn cydweithio.
Councils would also be required to work regionally on other services like education improvement, social services, additional learning needs and other aspects of land-use planning but have more flexibility on the footprint in which they work together.