GMAT Sentence Correction (SC) | Mandate vs Recommend [Bossy verbs, SC]

This is the OA for a particular question:

The new regulations mandatethat a company allow its retiring employees who would otherwise lose group health care coverage to continue the same insurance at their own expense for a specific period.

So the correct pattern can be: 1. X mandate that a companyallow Y.

My doubt is, why do we use 'allow' and not 'allows'?

Because if I were to use recommend instead, which is another bossy verb, I would have, say,

2. I recommend that a company allow Y.
or
3.
...

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