Complex sentence: The act is a bill (16 USC 431--433) passed by the United States Congress and signed into law by President Theodore Roosevelt on June 8,1906 which strictly forbids the removal of artifacts from Indian Mesa.
Split into simpler sentences: The act is a bill (16 USC 431--433) passed by the United States Congress and signed into law by President Theodore Roosevelt on June 8,1906. It strictly forbids the removal of artifacts from Indian Mesa.