The forms in the Schedule, or forms substantially similar, shall be used for the following purposes: (a) a notice under the provisions of section four of the Act, being a notice terminating a tenancy of the business premises to which the Act applies, shall be in Form 1; (b) a notice under the provisions of section six of the Act, being a tenant's request for a new tenancy of business premises to which the Act applies, shall be in Form 2; (c) a notice under the provisions of subsection (1) of sec