IPCC Units Exams

Can any one tell whats the passing requirement of Units

persons who had passed any grp in pe-2 or pcc

            or

persons who got exemptions in any paper in pe-2 or pcc

can apply for unit exams of IPCC

Can any one tell whats the passing requirement of Units

is it the same 40% & 50 % per Unit or

for the entire group ?