First Aid 6400, 6401, 6402 – Refresher training grace period November 28th, 2022 Skills.org and Toitū te Waiora granted a three-month extension to the refresher training grace period in order to help providers deal with the COVID-19 pandemic. At present, the minimum duration of refresher training, where the learner’s certificate is no older than two years and six months from date of issue, is six hours of training and assessment. As of 1 February 2023, the minimum duration of refresher training, where the learner’s certificate is no older than two years and three months from date of issue, will be six hours of training and assessment.