do sth with the awareness that one is entitled to do it
It has been said more than once in the decided cases that section 7(4) cannot receive different constructions according to whether resort to the subsection arises for one of the reasons under section 7(3) or because the driver exercises his right to claim to have his breath specimen replaced under section 8(2). BNCI
When the seller exercises his right of resale --; whether under subsection (3) or under subsection (4), the contract with the first buyer is thereby rescinded. BNCI
It also applies where the buyer exercises his right to reject the goods and treat the contract as repudiated because of a breach of condition. BNCI