Ronald Williams, the chairman of Aetna Inc., says his company is ready to start applying the newly effective provisions of the Affordable Care Act.

Many health insurers, health insurance producers and health insurance industry groups have opposed passage and implementation of the Affordable Care Act, the legislative package that includes the Patient Protection and Affordable Care Act (PPACA).

President Obama signed the act into law March 23, and some provisions, including provider choice requirements, preventive care coverage requirements and young-adult dependent coverage access requirements, will take effect for plan or policy years starting on or after Thursday.

“These requirements are an important step toward helping all Americans gain access to health care, and I am proud to say that we are ready,” Williams says in a statement.

Aetna, Hartford (NYSE:AET), has been working closely with customers to help them comply with the regulations, Williams says.

“As we look ahead, we must set our sights on the most important issues facing our health care system and the American public, the issues of quality and affordability,” Williams says. “We know that the way to truly bend the cost curve is to promote quality health care that leads to better health outcomes, which ultimately results in lower costs. We are committed to working with all stakeholders to secure access to quality, affordable health care for all Americans.”

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