457b and loans

[30Rock]

What fiduciary obligations if any does the sponsor of a governmental 457b in Florida have regarding offering loans when there is more than one vendor and the vendors are not monitoring the loan limits? If a participant exceeds the loan limit under 72(p) there are tax consequences to the participant. What about for the employer - prohibited transaction rules under ERISA and the Code do not apply. All I can think of would be state law fiduciary issues regarding not monitoring the loan program and thereby jeoparding participants' retirement savings?

Any ideas?