Kya Sirf Main Hoon Jo IPC aur BNS Ke Beech Mein Fark Nahin Samajh Paa Raha?

Main IPC ke Section 45 aur BNS ke Section 25 mein bahut confused hoon. IPC ke Section 45 kehte hain ki jo bhi vartaman kanoon se behtar hai use apply kiya jayega. Lekin BNS ke Section 25 kehte hain ki jo bhi vartaman kanoon se behtar hai use apply nahin kiya jayega, phir bhi court vartaman kanoon se behtar ke case ko accept kar sakta hai. Kya sirf main hoon jo ye rules samajh nahin pa raha? Kya vartaman kanoon se behtar ki wajah se kanoon ki age badhna mushkil ho jata hai? Koi batao, please.