D.C. Mun. Regs. tit. 10, r. 10-C2004
To promote the clarity and understanding of design and construction standards, the Board and HPO may prepare design guidelines for use in conjunction with the standards. The Board's design guidelines shall augment the standards and provide examples of treatments that are recommended or not recommended.
Before the implementation of any design guidelines, the HPO shall submit the proposed guidelines to the Board for its review and acceptance. The Board shall adopt design guidelines only after distribution of the proposed guidelines to the public for review and comment, and a duly noticed public hearing at which the public may participate.
The HPO may make minor changes to adopted guidelines without a public hearing by the Board.
D.C. Mun. Regs. tit. 10, r. 10-C2004