The answer (like a lot of them) won't come from the regs, but from other documents.
Have a look at the AOC Certification Manual. You should find the school is required to document their training area on a map.
3. SPECIFIC REQUIREMENTS – PRIVATE SCHOOL
(1) The holder of a certificate with a private school classification must use or employ:
................
d. maps of a suitable scale clearly depicting the following:
- i. aerodromes used in training;
- ii. the general flying training area;
- iii. low flying areas with major obstructions clearly marked;
- iv. acrobatic flying area(s); and
- v. travel corridor(s) connecting aerodromes and training areas;
Same of course goes for Commercial schools.