Allows someone, not a party to the contract, to bring an action under it if: (a) the contract so provides or (b) it confers a benefit upon him, unless it appears that the contracting parties did not intend the term to be enforceable by him. Where the obligated party is aware that the third party has relied on the term, he may not rescind or vary the contract to the third party’s detriment. The express terms of the contract may require the third party’s consent to a variation. Insurance policies generally exclude the provisions of the Act.