As per my knowledge there is no any standard govt approved HR policies. All HR policies are drafted for company only.
But there are few rules/acts from govt. those are as below
Minimum wages act
leave with wages act
Equal remuneration act
https://www.citehr.com/353889-hr-man...-download.html you will find the HR Policy, also research Employee Handbook you will get many threads which can be referred and you can amend as per your need.
the hr policy should contain, equal rights of work, office timings, dress code, disciplinary proceedings, usage of internet for official/personal, outside activities, company terms of employment, confidentiality, technology, joining process, leave rules, maternity leave, working hours, weekly off, late arrival,house keeping, smoking, employee development, motivation, employee promotion, resignation, training and development, unauthorised absence, travel expenses etc.,