What governs the conditions under which workers report for work?

The correct choice is local working rules, as these rules are typically detailed agreements or practices established at the local level within a specific union or workplace that dictate various aspects of employment, including the conditions regarding when and how workers report for work. Local working rules are tailored to the specific needs and agreements of the workforce, reflecting the unique circumstances and understandings between union members and management.

While union guidelines can provide broad principles governing workers' rights and responsibilities, local working rules are more specific and applicable to the immediate working environment. Company policy certainly plays a role, but it is often influenced by or must align with the local working rules set in place by the union. State labor laws establish the overarching legal framework for labor practices, but they do not typically dictate precise conditions under which workers report for work at the local level. Thus, local working rules stand as the primary governing authority for reporting conditions in this context.