35 Advertising; business management; business administration - For services related to the advertising and business management aspects of purchasing, completion, management, and operation of aircrafts, namely, administrative processing of purchase orders; administrative services for medical referrals; advertising / publicity; advisory services for business management in relation to aircraft ownership; influencer marketing; market studies; marketing; marketing research; negotiation and conclusion of commercial transactions for third parties; negotiation of business contracts for others; online advertising on a computer network