The record date for determining the right of securityholders of a mutual fund to receive a dividend or distribution by the mutual fund must be one of
(a) the day on which the net asset value per security is determined for the purpose of calculating the amount of the payment of the dividend or distribution;
(b) the last day on which the net asset value per security of the mutual fund was calculated before the day referred to in paragraph (a); or
(c) if the day referred to in paragraph (b) is not a business day, the last day on which the net asset value per security of the mutual fund was calculated before the day referred to in paragraph (b).