Nor shall they be permitted to offer excuses.
Nor are they given permission to apologize
nor shall they be given permission, so that they can apologize
Nor are they allowed to offer excuses
And nor (it) be permitted/allowed for them so (that) they apologize/excuse themselves
Nor will be they given the opportunity to apologize
Nor will they be given permission to present excuses
Nor shall they be permitted to offer excuses
Nor will they be allowed to offer any excuses
Nor shall they be allowed to offer excuses
And they will not be permitted to put forth any excuse