From India, Bangalore
Your client has rightly advised you. As per Employees Compensation Act, you need to take Policy for maximum number of workmen deployed on any day at site during the policy period and not working nos. on any particular shift.
Legally you have to consider projected overtime wages also while taking the policy. Insurance company has right to reject your claim, if you are under insured or insured less no. of workmen. You are required to maintain wages records for all the workmen and when accident occurs need to produce to the insurance company alongwith the claim.
While obtaining policy you need to project category-wise wages amount but it should not be less than Rs.8000/- per month per workman.
From India, Thane