Line Rental Saver for 'existing' customers - delayed renewal query

[#1]

I read that Line Rental Saver is not available to 'new' customers, but is still available to existing customers.

If an existing customer chooses not to renew their Line Rental Saver and revert to paying monthly for line rental, will they be permitted to renew Line Rental Saver, for example 6 months later, to coincide with renewing their phone/broadband contract ?