The San Diego County will require contractors to disclose more information about the subcontractors they hire to make sure they comply with the health, safety and occupational laws governing construction projects.

The San Diego County Supervisory Board on Wednesday passed two ordinances on “subcontractor transparency,” requiring greater disclosure of subcontractors working on projects in unincorporated areas of the county.

“Transparency of the subcontractor is vital to protect workers and ensure the safety and proper performance of skilled labor,” said Nathan Fletcher, chairman of the supervisory board.

The ordinances require contractors who have county building permits or withdrawal permits to collect and report information about subcontractors before they appear on site.

Under the new rules, contractors must disclose the specialty of the subcontractor, name and contact, license number, address and employee compensation policy. They must also indicate the scope of their work and the date of its implementation.

They should note any violations of the Office of Occupational Safety and Health or the wages of the subcontractors. And they must indicate what special safety licenses or training requirements are required for the subcontractor to work.

Contractors must also document the status of subcontractors at a “disadvantaged enterprise”. This refers to the classification of small business owners in which socially or economically vulnerable individuals own at least a 51 percent stake and also control management and day-to-day business operations. The category includes blacks, Latinos, Indians, Asians and women business owners.

The new rules will apply to contractors who have permits to build residential plots of five or more plots and apartment buildings with five or more apartments, or who are completing some commercial renovation projects. The regulations also regulate projects with permits for taps for energy, water or sewage services.

The county issues 14,000 to 18,000 building permits annually and about 2,200 withdrawal permits annually, and the vast majority use subcontractors, the county said.