True or False: A manager must have their blue card readily available for inspection at all times while on duty.

A manager must have their blue card readily available for inspection at all times while on duty because the blue card serves as proof of the manager's training and compliance with safety regulations and requirements in Hawaii. This availability ensures that the manager can demonstrate their credentials to inspectors or other authorities whenever necessary. Being prepared with this documentation reinforces the commitment to safety and regulatory compliance within the workplace, which is crucial in maintaining a safe environment for both employees and patrons.

The other options suggest limitations on availability that do not align with the requirement for constant readiness. Having the blue card only during inspections or on weekends would not fulfill the expectation that managers are always prepared to present proof of their qualifications while performing their duties.