I cannot provide an answer to your question based on the statute excerpts provided. The excerpts you have supplied cover the Explosives Act, Food Reserve Act, Land Survey Act, and Dairies and Dairy Produce Act. None of these statutes contain information about the ZIALE LPQE exam, its pass mark, or its structure.
To answer your question accurately, I would need access to the relevant legislation or regulations that govern the ZIALE (Zambia Institute of Advanced Legal Education) Legal Practice Qualifying Examination. I recommend consulting the ZIALE directly or reviewing the specific regulations that establish this examination.