Final answer:
ASME B30.9 stipulates that sling periodic inspections should not exceed one year, with variations based on usage conditions.
Step-by-step explanation:
According to ASME B30.9, which pertains to the safety guidelines for slings used in lifting and rigging operations, the frequency of periodic inspections for slings should not exceed one year. However, the specific frequency can vary based on the sling's service conditions, such as heavy usage, which may require more frequent inspections. It is important to follow ASME standards to ensure the safety and integrity of lifting operations.