§ 19.11. Exemption and requirements for miniature cinematograph
machines. The above sections, 19.01, 19.03, 19.05, 19.07 and 19.09,
referring to permanent and portable booths, shall not apply to:

1. Any miniature motion picture machine in which the maximum electric
current used for the light shall be three hundred and fifty watts. Such
miniature machine shall be operated in an approved box of fireproof
material constructed with a fusible link or other approved releasing
device to close instantaneously and completely in case of combustion
within the box. The light in said miniature machine shall be completely
inclosed in a metal lantern box covered with an unremovable roof;

2. The use or operation of any so-called miniature motion picture
apparatus which uses only an enclosed incandescent electric lamp and
approved acetate of cellulose or slow burning films, and is of such
construction that films ordinarily used on full-size commercial picture
apparatus cannot be used therewith.