Veil and the Disguise Check

So very quick background, I'm writing a one shot for my group and I want one of the enemies to cast Veil on a large number of individuals who are different sizes, genders, and races (a -14 penalty according to the Disguise Skill, but +10 because they're being veiled into the caster).

The spell Veil says "You must succeed on a Disguise check to duplicate the appearance of a specific individual. This spell gives you a +10 bonus on the check".

Is the caster of the Veil spell the one who rolls disguise for everyone affected? Do those affected by the spell get a +10 to be found out, as they are under "Magic Alteration" (effectively being +20?) or does this only happen once.

The rule in question ```Magic Alteration Magic that alters your form, such as alter self, disguise self, polymorph, or shapechange, grants you a +10 bonus on Disguise checks (see the individual spell descriptions). You must succeed on a Disguise check with a +10 bonus to duplicate the appearance of a specific individual using the veil spell. Divination magic that allows people to see through illusions (such as true seeing) does not penetrate a mundane disguise, but it can negate the magical component of a magically enhanced one.```

A quick tl;dr would be when I cast Veil, I roll disguise as the caster for everyone affected (applying penalties and bonuses as appropriate)?

Edit: anyone?