Could you help me out with this sentence?

    Failure of machine components may not result in hazardous activation
    of the press.

I want to say that a component failure is not allowed to result in press activation. Do you think I have to use "must" or is "may" sufficient? Using "must" sounds odd to me, but "may" is perhaps not strong enough.

Thanks.

Ilka

May is open-ended.

Use shall or must instead.

Yes, I agree: should not or must not. Reading the phrase in isolation may not gives the feeling that it’s just a matter of chance whether the failure of the components will result in press activation - as in: it may not, but then again it might.

Grant