Which of the following is a duty of UA membership as per the SFE?

Staying off cell phones while working is a duty of UA membership as per the SFE because it emphasizes maintaining professionalism and focus on the job. This duty aligns with the expectation that members will prioritize workplace responsibilities and engage fully in their tasks without distractions. By avoiding personal phone use during working hours, members can enhance productivity, ensure safety, and promote a respectful environment that values teamwork and collaboration. This principle is crucial in upholding the standards of the organization and ensuring that members are fully present and committed to their roles. The other options do not reflect the standards and responsibilities typically expected in a professional setting, where focus, appearance, and respect for work time are important.