; the foregoing each incorporating buttons for the operation of the camera, an opaque plastic base that clips into a camera mount, a thumb-screw on the base mount that allows for adjustment of the camera viewing angle on a pivot, a silicon gasket in the door of the case that allows for waterproof operation of the camera at a depth of not more than 40 m, a flat, optically-coated, glass lens and a heat sink to dissipate camera heat (provided for in subheading 4202.99.90) Free No change No change On or before 12/31/2020 . 1138. Skeleton camera housings Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.12.55 Camera cases of molded polycarbonate plastics, such cases designed to hold cameras of subheading 8525.80.40, each case incorporating buttons for the operation of the camera, a plastic clip attached to a base mount, a thumb-screw on the base mount that allows adjustment of the viewing angle on a pivot, a flat and optically-coated glass lens and open spaces that allow air and sound to enter (provided for in subheading 4202.99.90) Free No change No change On or before 12/31/2020 . 1139. Opaque camera housings Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.12.56 Camera cases designed to contain cameras of subheading 8525.80.40; such cases of opaque molded polycarbonate plastics in a solid color and with nonreflective surface; each incorporating buttons for the operation of the camera, a plastic clip attached to a base mount, a thumb-screw on the base mount designed to facilitate the adjustment of its viewing angle on a pivot, a silicon gasket in the door of the housing designed to allow for waterproof operation of the camera at a depth of more than 40 m but not more than 60 m