Maintain Stock Register

Stock register is there for every software.

AS 2 guidelines are used. However, input, WIP, cos and finished goods are recorded

 measures to maintain and verify stock is given in auditing.

https://www.mca.gov.in/Ministry/pdf/CompaniesAct2013.pdf

Point 128 will give you the legal provision of the companies act. I guess tax also has such provision if your u look carefully 

Forgot to mention, your costing books have those provisions to create a stock ledger. Cost GAAP is legal. If you can’t find it in a particular ca text book, look for cost accountants of India books.