Without prejudice to Article 56, insurance and reinsurance undertakings may use simplified methods when they calculate the risk margin, including one or more of the following:
((a))
methods which use approximations of the amounts denoted by the terms SCR(t) referred to in Article 37(1);
((b))
methods which approximate the discounted sum of the amounts denoted by the terms SCR(t) as referred to in Article 37(1) without calculating each of those amounts separately.