Aside from the technical data, I suggest editing out any superfluous language. The contractor bears responsibility to ensure the work complies with the notes, so it means nothing to say it in the note. It’s a condition of the contract.

When it comes to establishing the tolerance of the substrate, it really should be stated based on an industry standard method of measurement. However, that much could be said once, by reference to a standard document or industry association. The tightness of the maximum deviation from plane in 10 feet might customarily be 1/4”, but you would probably have to know the tile manufacturer’s recommendation to be sure. A thin-set large-format tile might require a flatter substrate than that.