New home construction. Oakville Ontario.
Architect suggests 5/8" drywall on stud spacing of 24" centers for the interior wall. Can I use 1/2"?

Same question applies for ceiling drywall Trusses at 24" c-c. Can I use 1/2" gyprock? I understood that with the stronger drywall sheets now available we can use 1/2" on the ceiling