(c)[ The charges for ordinary and SVH trunk calls 3[between any two Short Distance Charging Centres, or two Long Distance Charging Centres), not being situated within a radial distance of fifty kilometres, shall be reduced by 50 per cent of the charges specified in Cl. (a)- [Substituted by G.S.R. 386(E), dated 22.5.1984](i)on all Sundays and National Holidays, and(ii)between 00.00 hours and 05.00 hours and 22.00 hours and 24 hours on other day].