Time, place, and value of supply are important concepts under the GST system. The time of supply determines when tax must be paid and refers to the earliest date that goods or services are supplied. The place of supply generally refers to the location of the recipient. Special rules determine the place for certain types of services. Value of supply means the money collected from the recipient but if parties are related, the transaction value between unrelated parties in the normal course of business is used to ensure proper tax is paid.