The OSG counters that the rendition of pro bono services envisioned in Section 17 can hardly be considered as forced labor analogous to slavery, as reproductive health care service providers have the discretion as to the manner and time of giving pro bono services. Moreover, the OSG points out that the imposition is within the powers of the government, the accreditation of medical practitioners with PhilHealth being a privilege and not a right. The point of the OSG is well-taken. It should first be mentioned that the practice of medicine is undeniably imbued with public interest that it is both a power and a duty of the State to control and regulate it in order to protect and promote the public welfare. Like the legal profession, the practice of medicine is not a right but a privileged burdened with conditions as it directly involves the very lives of the people. A fortiori, this power includes the power of Congress263 to prescribe the qualifications for the practice of professions or trades which affect the public welfare, the public health, the public morals, and the public safety; and to regulate or control such professions or trades, even to the point of revoking such right altogether.264 Moreover, as some petitioners put it, the notion of involuntary servitude connotes the presence of force, threats, intimidation or other similar means of coercion and compulsion.265 A reading of the assailed provision, however, reveals that it only encourages private and non- government reproductive healthcare service providers to render pro bono service. Other than non-accreditation with PhilHealth, no penalty is imposed should they choose to do otherwise. Private and non-government reproductive healthcare service providers also enjoy the liberty to choose which kind of health service they wish to provide, when, where and how to provide it or whether to provide it all. Clearly, therefore, no compulsion, force or threat is made upon them to render pro bono service against their will. While the rendering of such service was made a prerequisite to accreditation with PhilHealth, the Court does not consider the same to be an unreasonable burden, but rather, a necessary incentive imposed by Congress in the furtherance of a perceived legitimate state interest. Consistent with what the Court had earlier discussed, however, it should be emphasized that conscientious objectors are exempt from this provision as long as their religious beliefs and convictions do not allow them to render reproductive health service, pro bona or otherwise. 9-Delegation of Authority to the FDA The petitioners likewise question the delegation by Congress to the FDA of the power to determine whether or not a supply or product is to be included in the Essential Drugs List (EDL).266 The Court finds nothing wrong with the delegation. The FDA does not only have the power but also the competency to evaluate, register and cover health services and methods. It is the only government entity empowered to render such services and highly proficient to do so. It should be understood that health services and methods fall under the gamut of terms that are associated with what is ordinarily understood as "health products." In this connection, Section 4 of R.A. No. 3 720, as amended by R.A. No. 9711 reads: