Complex sentence: However, because of the rapidly changing fire dept codes and regulations many fire depts had to switch to a different brand of helmet, and the Topgard branded MSA helmet was trimmed and modernized into a construction helmet.
Split into simpler sentences: However, because of the rapidly changing fire dept codes, and regulations. Many fire depts had to switch to a different brand of helmet, and the Topgard branded MSA helmet was trimmed and modernized into a construction helmet.