The Ghillie Shirt

[Tobus]

I'd like to state that a belt is completely formal as it is not worn with evening kilt dress. It is only worn in day wear or semi-formal kilt dress but only when without a waistcoat.

I'm confused by what you're saying. If a belt is "completely formal", it is perfectly appropriate with evening dress.

Typically, certain types of belts are appropriate for daywear, and there is the option of not wearing a belt at all. Other types of belts (the ones with shiny waistplates) are more appropriate for evening dress, but only in certain scenarios. Wearing a belt with waistplate under a waistcoat is a bit of a faux pas, but wearing one over certain types of doublets/jackets are expected. It really just depends on the type of belt, the level of dress, and the type of jacket.