Sentence examples for is optional until from inspiring English sources

The September rules go into effect Jan . 30 compliance with the December clarifications is optional until Oct. 1.

It is optional until you are admitted, but it will be required to obtain your I-20 (visa).

Primarily, now that the analog switch-off is optional until June 12, what stations will switch off when?

center, he recounted, and didn't learn that the palm scan was optional until he hesitated and asked questions.

Fresh tumour biopsies before and after EZN-4176 administration were optional until determination of the MTD.

Sensitivity is optional.

Digitization is optional.

Sugar is optional.

Cutlery is optional.

(Power operation is optional).

Sex is optional".