Can an eligible local government body still opt in if it missed the deadline on 9 March 2017 for close of the current opt-in period?

A body that received an invitation to opt in for the five-year appointing period beginning 1 April 2018 but did not submit a formal notice of acceptance of the invitation before the close of the opt-in period is still able to opt in, but cannot do so until the start of the appointing period, on 1 April 2018.