"Strict control" refers to having a strong and firm level of authority or management over something, ensuring rules and regulations are followed closely and thoroughly. Full definition
Employers will need to carefully control access to personal information that is collected about employees and should impose strict controls on the use and access of that personal information. (mannlawyers.com)
These single - species habitats allow for strict control of the water chemistry and lighting to match the needs of the coral. (petbusiness.com)
Maintaining strict control over language and metaphor, boring people make sure that nothing dangerous or unexpected comes out of their mouths. (religion-online.org)