On April 12, 2006, the governor signed the resulting Massachusetts health reform law, commonly called "Romneycare", which requires nearly all Massachusetts residents to buy health insurance coverage or face escalating tax penalties, such as the loss of their personal income tax exemption. The bill also established means-tested state subsidies for people who lacked adequate employer insurance and whose income was below a threshold, using funds that had covered the health costs of the uninsured. He vetoed eight sections of the health care legislation, including a controversial $295-per-employee assessment on businesses that do not offer health insurance and provisions guaranteeing dental benefits to Medicaid recipients. The legislature overrode all eight vetoes, but the governor's office said the differences were not essential. The law was the first of its kind in the nation and became the signature achievement of Romney's term in office.