is the total amount of issued share capital for which the shareholders are required to pay is the authorized share capital or issued share capital or call up share capital or paid up share?

The total amount of issued share capital for which shareholders are required to pay is referred to as "issued share capital." This represents the portion of the authorized share capital that has been allocated to shareholders and is under their obligation to pay. In contrast, "paid-up share capital" refers to the amount that shareholders have actually paid, while "call-up share capital" pertains to amounts that may be called for payment in the future.