Which of the following roles is typically non-union?

In the film production industry, the line producer is often associated with non-union roles. This position is responsible for managing the budget and the day-to-day physical aspects of the production. Since line producers are heavily involved in the logistics and financial planning, they can be hired on a contract basis and may not necessarily be part of a union, particularly for independent films or smaller productions that operate outside union regulations.

On the other hand, roles like the 2nd Assistant Director, Locations Manager, and Producer are typically union positions that adhere to the guidelines and agreements set forth by the unions in the film industry. These roles often require union membership to ensure that workers receive fair wages and benefits as per the union's standards. This distinction is crucial, particularly in larger productions governed by union agreements and standards.