; or (II) the vapor products are delivered to the buyer by common carrier, private delivery service, or other method of remote delivery, or the seller is not in the physical presence of the buyer when the buyer obtains possession of the vapor products. (ii) The term delivery seller means a person who makes a delivery sale, or provides an online marketplace to facilitate a delivery sale. (iii) The term online marketplace means an online portal or other digital or similar platform that facilitates the sale of products to consumers, through retail sale, auction, or similar transactions. . 776. Not later than 180 days after the date of the enactment of this Act, the Secretary of Health and Human Services shall submit a report to the Committees on Appropriations of both Houses of Congress, the Committee on Health, Education, Labor, and Pensions of the Senate, and the Committee on Energy and Commerce of the House of Representatives, that includes a plan of action with respect to the development and operation of the Youth Vapor Product Education, Prevention, and Enforcement Program. 777. (a) The Commissioner of Food and Drugs shall conduct a study on preventing the use of electronic nicotine delivery systems (referred to in this section as ENDS ) by youth. Such study shall include an analysis of— (1) the potential costs and benefits of using, and requiring the use of, biometric security measures in ENDS— (A) during premarket development; (B) at the time of sale; and (C) during postmarket use; (2) the effectiveness of such biometric security measures in preventing usage by youth of ENDS; (3) the potential costs and benefits of requiring such biometric security measures for sales of ENDS made through mail delivery and via the Internet