Sentence examples similar to not compulsory at present from inspiring English sources

Further ethical approval and material transfer agreement were not compulsory at the time the study was initiated.

While sparring is not compulsory at your grading, we recommend that you do it.

§Submission of strains for serotyping at the central laboratory was not compulsory in Switzerland at the time of data collection.

The Royal Institute of British Architects (which, unlike ARB, is not compulsory for architects) also has a "find an architect" service at architecture.com.com

Probably, not much at present.

This difference is not understood at present.

Although in uniform, NAAFI was not compulsory, we could leave at any time.

Massages are entirely at their discretion, not compulsory.

The quota is not compulsory, but that will be reviewed at the end of the year.

Fortunately for those at Kingston University, gowns are not compulsory.

At the time of the study co-payment systems at the ED were not compulsory and not in common use.