Section 55E | Limitation on number of tax reductions and elections
From legislation.gov.uk
(1)An individual is not entitled to more than one tax reduction under section 55B for a tax year (regardless of whether the individual is a party to more than one marriage or civil partnership in the tax year).
(2)An individual is not entitled to have more than one election for the purposes of section 55B which operates for a tax year (regardless of whether the individual is a party to more than one marriage or civil partnership in the tax year).