Additional Surveillance Measure - PSE & PSB

Why Public Sector Enterprises & Public Sector Banks are exempted in Additional Surveillance Measures as rules should be same for all securities to avoid stock manipulation?
Link of this market surveillance is given below. In page 4 it is mentioned.
https://static.nseindia.com//s3fs-public/inline-files/FAQs_Additional_Surveillance_Measure_ASM_2.pdf

Since they are already manipulated by the government, they weren’t included.