FlightDetent. In post #35y you wrote
My choice is FL75 and seek clarification.
Now,
Despite FL75 not being enforceable, which is 100% agreed,
Are you looking to change your career to that of MP?
Seriously, if
FL 075 is valid on the track 225* into DIXIR, when will descent out of FL 75 be permitted? Why would it not be valid on the clearance received by the OP?
Let me tease with a question. Had the you or the OP received a clearance ALT - DIXIR, what then would be the required level and why.