THIS IS A RECERT with PRECERT. THIS IS A RECERT with PRECERT) The NL precert is designed to deliver program updates and offer skill practice prior to being evaluated. Pre-requisites: NL-Pool, CPR C and AMOA Full refunds for Advance Aquatics courses require a minimum of seven days notice to withdraw.. Withdrawals within seven days of start date are refunded at 50%. No refunds on or after start date.