174(1)
The date specified in a notice under section 173 may not be less than six months after the day on which the notice is given to the contract-holder.
174(2)
This section is a fundamental provision which is incorporated as a term of all periodic standard contracts, except periodic standard contracts which—
(a) do not incorporate section 173 as a term of the contract, or
(b) are within Schedule 8A (whether or not they incorporate section 173 as a term of the contract).