Don't have a reference, but I'm pretty sure the following applies:
If the approach or departure is non-rnav, i.e based on conventional navaids, then they must be operating as intended for the approach. For example, if the approach is an VOR/DME, you must have both VOR and DME indications, unless specific timing is given in the case of an inop DME.
Likewise for departure. if it is based on conventional navaids, then you must be able to use them. I know most people simply select LNAV once airborne irrespective of whether it is conventional or not, but as far as I'm aware, you must still be able to used the navaids defined in the procedure.