'OE' that is indeed correct, only A/C with cert Alts & auto-flight systems & serviceable can operate in RVSM. Hand flying in RVSM airspace wouldn't ordinarily be acceptable. If yr auto flight system fails (same as hand flying) then you are required to vacate RVSM airspace as you no longer can comply.It's damned hard work keeping in tolerance at say 39000' for extended periods of time.
I believe under certain circumstances manual flight up to say the trans level would be acceptable & even then the work load is higher for the PNF which means the level of safety afforded by an AP is reduced & the whole reason why we have such sophisticated AP systems in the first place is to remove the lowest common denominator, the pilot:-)
Hand fly an ILS with A/T off, that's a challenge at times.
Wmk2