In June 1975, it was announced that Eastwood would star in the film with a scheduled Bicentennial Celebration release. Principal photography began on October 6 in Lake Powell and nearby Paria, Utah. A rift between Eastwood and Kaufman developed during the filming. Kaufman insisted on filming with a meticulous attention to detail, which caused disagreements with Eastwood, not to mention the attraction the two shared towards Locke and apparent jealousy on Kaufman's part in regard to their emerging relationship. One evening, Kaufman insisted on finding a beer can as a prop to be used in a scene, but while he was absent, Eastwood ordered Surtees to quickly shoot the scene as light was fading and then drove away, leaving before Kaufman had returned. Soon after, filming moved to Kanab, Utah. On October 24, 1975, Kaufman was fired at Eastwood's command by producer Bob Daley. The sacking caused an outrage amongst the Directors Guild of America and other important Hollywood executives, since the director had already worked hard on the film, including completing all of the pre-production. Pressure mounted on Warner Bros. and Eastwood to back down, and their refusal to do so resulted in a fine, reported to be around $60,000 for the violation. This resulted in the Director's Guild passing a new rule, known as "the Eastwood Rule", which prohibits an actor or producer from firing the director and then personally taking on the director role. From then on, the film was directed by Eastwood himself with Daley second-in-command; with Kaufman's planning already in place, the team was able to finish making the film efficiently.