Recreational Pilot Licence. Roughly equivalent to the UK NPPL or European LAPL in some non-European countries.
I think it's been adequately covered, but the basic principle remains - Va is the point where the stall curve and g-limits co-incide. So, slower than that, the stall will protect the aeroplane from exceeding g-limits following a severe pitch input or vertical gust, above that the stall will not do that and the aeroplane can pull more g. Whilst the total load is what matters to the mainplane, all sorts of other structure (seats,. engine mounts, harnesses, any random box of electronics) are certified against their actual weight and a maximum g so it remains the total g that matters, not the total load. Heavier aeroplane, stall speed goes up, therefore so does Va. So long as you are below MAUM and within the g-limits, the total certified strength of the mainplane can't be exceeded.
G