1. Short title This Act may be cited as the Bird-Safe Buildings Act of 2019 . 2. Use of bird-safe building materials and design features (a) In general Chapter 33 of title 40, United States Code, is further amended by adding at the end the following: 3319. Use of bird-safe building materials and design features (a) Construction, alteration, and acquisition of public buildings Each public building constructed, acquired, or of which more than 50 percent of the facade is substantially altered (in the opinion of the Commissioner of Public Buildings) by the Administrator of General Services shall meet, to the maximum extent practicable, as determined by the Administrator, the following standards: (1) At least 90 percent of the exposed facade material from ground level to 40 feet— (A) shall not be composed of glass; or (B) shall be composed of glass employing— (i) elements that preclude bird collisions without completely obscuring vision, such as secondary facades, netting, screens, shutters, and exterior shades; (ii) ultraviolet (UV) patterned glass that contains UV-reflective or contrasting patterns that are visible to birds; (iii) patterns on glass designed in accordance with a rule that restricts horizontal spaces to less than 2 inches high and vertical spaces to less than 4 inches wide, commonly referred to as the 2 × 4 rule ; (iv) opaque, etched, stained, frosted, or translucent glass