What is the major act of parliament that lays down the duties of employers and employees with regard to workplace safety?

Notice: Trying to access array offset on value of type bool in /home/onliiuxo/public_html/wp-content/themes/betheme/functions/theme-functions.php on line 1490

Notice: Trying to access array offset on value of type bool in /home/onliiuxo/public_html/wp-content/themes/betheme/functions/theme-functions.php on line 1495