one of the key, universal principles related to product promotion is that we may not promote or pre-sell a product that has not yet been approved or cleared by the relevant regulatory body for the location or usage in question.

How would the previous sentence be correctly capitalized?
One of the key, universal principles related to product promotion is that we may not promote or pre-sell a product that has not yet been approved or cleared by the relevant regulatory body for the location or usage in question.