Mental Institution and Arrest under CrPC

Maine 1 question padha jo mujhe laga yeh kaafi tricky hai. Pehle dekhna kaisa hai, bas police officer ko power deti hai kisi ko arrest karne ke liye, woh apne duty magistrate ke pass jaakar report karta hai, phir duty magistrate order deti hai ki usko 24 ghante ke liye custody mein rakhna hai ya nahi. Lekin problem yeh hai ki duty magistrate ko court ke rules ke anusaar yeh power di jaati hai, aur police officer ko koi power nahi di jaati. Isliye, agar police officer apni marzi se koi ko arrest karega, toh yeh legally correct nahi hai, kyunki duty magistrate ko pata nahin hai ki koi arrest kiya gaya hai.