The Interagency Policy Statement on Retail Sales of Non-Deposit Products authorizes payment of a nominal incentive for referrals on nondeposit products. The nominal payment (Ithink the policy or some other literature I have seen mentions a max of $25) must be a one-time payment and not related to whether or not an account is etablished.
That pretty much kills the idea of a referral of 10% of first-year income on investment accounts.
I think the SEC and NASD also have rules regarding compensation of unlicensed personnel. The situation you describe would fall into the category of paying a commission. The NASD and SEC frown on unlicensed personnel receiving commissions.