Mujhe Evidence Act 3 ke Section 30 ke saath BSA ke Section 19 ke beech kya sawal hai?

Maine aaj class mein suna ki Section 30 Evidence Act mein yeh kaha gaya hai ki jab ek witness apne vachan se khadi hui statement ka bharosa na kar sakta hai, to use bharoshi hone par bhi wahi prabhav padta hai jiski pehli statement ko bharoshi jati hai. lekin Section 19 BSA kehete hain ki jab ek witness apni statement ko bharosi kehlaata hai, to use bharosa karne wala bhi bharosi kehla sakta hai. Mera sawal yeh hai ki yeh section ek-dusre ke saath kaun se jude hain?