Confusion on Exclusionary Rule under Section 27 Evidence Act: When does it cease to be relevant?

Main question here is, kya 27 Evidence Act ko apply karte samay, mere case file ko recover karne ke liye kiya jaata hai yeh jaanch karna zaree hoga? Toh ek case mein, police officer ne case file ko recover karke submit kiya, phir kuch logon ne case se judne ke liye claim ki, lekin unke paas file nahi tha. Ab kya yeh ek relevant issue hai, ya to case 27 Evidence Act ke under apply hoga ya nahi? Toh kya yeh recover karna relevant ya irrelevant hoga? Yeh samajh mein nahi a raha hai.