Absolutely - the trig point quadripod identifies a MC.
Not all MCs have ever had a quadripod and disk over them (eg in Mc Kier in Aranda)
Not all trigs have a MC 'cos they are too old (eg Gooroo).
Not all trigs that are fabulous finds are any form of survey mark at all any more (eg Palmer in Amaroo)
Try looking at the fun and frustrating website http://www.actmapi.act.gov.au
- click on Advanced Maps
then turn on all the survey control marks you want.
Trig points are fun - I would log the second two but not the first