Stallie,
Sorry forgot to answer that bit.
If you look up AIP ENR 1.5-32 paras 8 & 9, Category 1 & 2 minima, you will find that only DA is mentioned for Cat 1 and Cat 2 mentions both DA & RH.
So, RH is only applicable for CAT 2 or higher.
As Arm out the Window says it's a wording to cover all ILS's; at a guess(sorry, shouldn't guess) it's there in case they decide to develope Cat 2 or better, or it maybe they've lifted it straight out of an ICAO document.
For your info, ILS's in Oz are calibrated to Cat 2 but are only actually capable for Cat 1 use due to other factors; YBBN 19 is an exception as it has the lighting requirements but not I am not sure why it isn't used to Cat 2, probably other things.
Hope this helps.