CNS News 
Oct 22, 2012
A little-known section in the ObamaCare health reform law defines “full-time” work as averaging only 30 hours per week, a definition that will affect some employers who utilize part-time workers to trim the cost of complying with the ObamaCare rule that says businesses with 50 or more workers must provide health insurance or pay a fine.
“The term ‘full-time employee’ means, with respect to any month, an employee who is employed on average at least 30 hours of service per week,” section 1513 of the law reads. (Scroll down to section 4, paragraph A.)
That section, known as the employer mandate, requires any business with 50 or more full-time employees to provide at least the minimum level of government-defined health coverage to those employees.
In other words, a business must provide insurance if it has 50 or more employees working an average of just 30 hours per week, which is 10 hours per week fewer than the traditional 40-hour work week.