shall

1. (in the first person) expressing the future tense.

this time next week I shall be in Scotland

2. expressing a strong assertion or intention. 

they shall succeed

3.  expressing an instruction or command. 

you shall not steal

4.  used in questions indicating offers or suggestions. 

shall I send you the book?

shall mandatory = ist obligatorisch

mandatory =  required by law or rules; compulsory.

wearing helmets was made mandatory for cyclists

must mandatary = muss zwingend sein

must mandatory = muss verpflichtend sein

compulsory = verpflichtend.   Required by law or a rule; obligatory. Compulsory military service

Guten Morgen. 

Das sollte jetzt eindeutig sein.

Transpondernutzung NfL 1-1687-19

VG Patrick