We have two groups of users. They are: g1 = {u1g1, u2g1, u3g1, u4g1}
g2 = {u1g2, u2g2, u3g2, u4g2, u5g2}
The PACL for u1g1 includes u2g1, u3g1, u1g2, u3g2, u5g2. PACL for u1g2 includes u1g1, u3g1, u2g2, u3g2, u4g2, u5g2. Let’s assume that u1g1 and u1g2 share a file f1 created by u1g1. Let’s also assume that u1g2 creates a file f2 before reading file f1 and creates a file f3 after reading accessing file f1. Which user can read which file?