A. Not if you do it right.
Strictly speaking, "referral fees" remain illegal in all but a few states like California and Virginia. Since you can't give "anything of value" in return for a recommendation or referral, direct payments for either are forbidden
in most jurisdictions.
At bottom, lawyers cannot profit from a case unless they have "skin in the game," either through their own service to the client or by bearing joint liability if something goes wrong. Unlike a lawyer who makes a referral and walks away, you're on the hook if your co-counsel falters. To share in fees, you must assume an ethical duty to ensure that the case is handled competently to protect the client's interests. If you're not willing to accept this burden, you're better off giving clients the names of some reputable attorneys and wishing them well.
If you properly verify the qualifications of your co-counsel, and actively monitor their efforts, you may effectively "broker" a case to a lawyer outside of your firm. This is true even if you're not licensed where the case is pending. Although most jurisdictions prohibit lawyers from splitting fees with non-lawyers, lawyers from different states may share fees if they follow the rules.
Where jurisdictions were once split on the issue of "fee splitting," this practice has been accepted across the globe. As "multi-national" practices continue to grow, virtually all jurisdictions that have addressed the issue have given their blessings to fee-sharing arrangements with foreign lawyers who have professional education, training and ethical standards comparable to those of their American counterparts.