ALM17500 | Pooled PAYE schemes: setting up a new PAYE scheme
From HM Revenue & Customs · Apprenticeship Levy Manual
Employers who need to set up a new PAYE scheme will need to have set it up between 6 February and the end of March 2017.
The action guide outlines the steps employers will need to take to set up a new PAYE scheme - see ALM17700.