Regulation by Mortgagee Letter. The Department of Housing and Urban Development this week urged House lawmakers to grant it statutory authority to make temporary changes to the Home Equity Conversion Mortgage program through mortgagee letters while working to formalize the change through rulemaking. In a hearing before the House Financial Services Subcommittee on Housing and Insurance this week, Charles Coulter, HUD deputy assistant secretary for single-family housing, sought specific authority to limit the amount that may be drawn from ...