[Some acronym] is a provision in the ND Public Employees Retirement system that allows members who participate in an approved deferred comp plan to receive up to 4% of salary credited to their member account in addition to the 7% employee contribution.
A "deferred comp[ensation] plan" is a 401k, 403b, 457b, etc. Doesn't say how the "up to" amount is determined but is the rest understandable?
This allocation is from the employer contribution received
This is muddy. Perhaps the gist is that the "up to 4%" doesn't come out of your salary, but rather is an additional payment from your employer.
and earns interest monthly.
That part seems straightforward enough, although "how much" interest would be good to know.