John,
I read paragraph (d). If the airplane doesn't roll more than 15 degrees, why would there be a need to move the ailerons from neutral?
If the airplane is consistently rolling left when stalled then a stall strip that is properly placed on the right wing will ensure the airplane stalls evenly and complies with paragraph (d) without any deflection of the ailerons from neutral. Or a stick pusher could be installed to ensure that the roll does not exceed 15 degrees.
I don't think paragraph (d) guarantees that you are able to use ailerons after the point of stall without the airplane rolling opposite to the aileron deflection.