(1) Subject to subsection (5), a grocery goods undertaking shall not directly or indirectly attempt to compel or coerce another grocery goods undertaking, whether by threat, promise or any like means, to resell or advertise for resale any grocery goods at -

(a) a price fixed directly or indirectly by the first mentioned grocery goods undertaking, or

(b) a price above a minimum price fixed directly or indirectly by the first mentioned grocery goods undertaking.

(2) Subject to subsection (5), a grocery goods undertaking shall not apply dissimilar conditions to equivalent transactions with any other grocery goods undertaking.

(3) Subject to subsection (5), a grocery goods undertaking shall not directly or indirectly compel or coerce, whether by threat, promise or any like means, another grocery goods undertaking to make any payment or grant any allowance for the advertising or display of grocery goods.