The Universal Credit, Personal Independence Payment, Jobseeker's Allowance and Employment and Support Allowance (Claims and Payments) Regulations 2013

Time within which a claim for an employment and support allowance is to be made E+W+S

28.  A claim for an employment and support allowance must be made on the first day of the period in respect of which the claim is made or within the period of three months immediately following that day.