In this part—
(a) a reference to a contract in association with a reference to a retention trust is a reference to the contract for which the trust is required; and
(b) a reference to a contracting party in association with a reference to a retention trust is a reference to the contracting party for the contract for which the trust is required; and
(c) a reference to a contracted party in association with a reference to a retention trust is a reference to the contracted party for the contract for which the trust is required; and
(d) a reference to a trustee in association with a reference to a retention trust or a contract for which a retention trust is required is a reference to the trustee for the retention trust.