If the person have passed an initial course training on Feb. 7, 2013, he will be given a certificate valid until Feb. 28, 2015.
The interpretation of the “month” is at the end of the month and not at the beginning of the month. Recurrent training to obtain an extension of the validity can be taken 3 months ahead from expiry, i.e., from Dec. 1, 2014. If he passes, his certificate will be revalidated to Feb. 28 2017. This repeats with every successful recurrent course. The end of February validity will stay as long as he passes the recurrent course every two years.
If for some reason, he takes a recurrent course more than 3 months in advance, say on Sept. 10, 2014, he will lose the February cycle. His new expiry will be Sept. 30, 2016.