Final answer:
If there are multiple certified members on the committee, they can make joint decisions, designate a lead certified member, or use majority vote to determine actions.
Step-by-step explanation:
If there are more than one certified members on the committee in the context of OHSA (Occupational Health and Safety Act), the decision-making process can vary. One possibility is that the certified members could make joint decisions, meaning they would discuss and agree upon actions as a group. Another possibility is that a lead certified member could be designated, who would have the authority to make final decisions or break any ties. In some cases, majority vote may also be used to determine actions, where the decision that receives the most votes is implemented.