CPC mein 'Mental Capacity' ka koi khas kanoon nahin - Kya yeh sach hai?

Mujhe lagta hai, yeh claim bahut majak hai. CPC mein Mental Capacity ka khas kanoon ki zaroorat nahin hai kyunki IPC aur Hindu Marriage Act mein bhi isse judne wale khane hain. Agar ek vyakti mental capacity mein kamjor hai, to kanoone mein isse judne wale case IPC 85 mein milte hain, jismein "Mentally ill person incapable of judging his own acts" ka dhyan diya gaya hai. Aur Hindu Marriage Act mein bhi, ek husband ki mental capacity ki samasya ko samjhna hai. Toh CPC mein hi mental capacity ka vishesh dhyan dena jaroori hai na?