**X-post from Fair Lending - this is probably a better home for it**
We have risk based pricing on our credit cards. When a customer requests an increase to their line of credit, we basically treat it as a new application - run credit, calculate DTI, etc. Then we slot them into our risk based pricing matrix. In some cases, that means a higher rate - which we present as an option: "We can increase your limit from $10,000 to $15,000, but if we do so we'll also have to increase your rate by 2%. Do you still want to move forward or keep things as they are?"
This doesn't seem to be addressed specifically in Reg Z, but a strict reading seems to put us in a gray area. Is our practice kosher, or are we running into requirements like re-evaluating credit every 6 months and all that stuff?