I believe so but don’t quote me. As a restaurant, you’re subject to the OHS Industrial Establishments Regulation. And the minimum age of employment for such an establishment “other than a factory,” is 14. Here’s an excerpt from the Regulation–bold face is from me:
4. (1) Subject to subsection (2), the minimum age of,
(a) a worker; or
(b) a person who is permitted to be in or about an industrial establishment,
shall be,
(c) sixteen years of age in a logging operation;
(d) fifteen years of age in a factory other than a logging operation; and
(e) fourteen years of age in a workplace other than a factory. R.R.O. 1990, Reg. 851, s. 4 (1).
(2) Clause (1) (b) does not apply to a person who,
(a) while in the industrial establishment, is accompanied by a person who has attained the age of majority;
(b) is being guided on a tour of the industrial establishment;
(c) is in an area of the industrial establishment used for sales purposes; or
(d) is in an area of the industrial establishment to which the public generally has access. R.R.O. 1990, Reg. 851, s. 4 (2).
(3) Clauses (1) (d) and (e) do not apply with respect to a worker who works as a performer in the entertainment and advertising industry. O. Reg. 179/07, s. 1.