For the purpose of this article, the following words as used herein shall be considered to have the meaning ascribed thereto:
Any person who has obtained a valid certificate of registration as hereinafter provided, which certificate is in the possession of the solicitor on his or her person while engaged in soliciting.
Every separate living unit occupied for residential purposes by one or more persons, contained within any type of building or structure.
Any one or more of the following activities:
Seeking to obtain orders for the purchase of goods, wares, merchandise, foodstuffs, services, of any kind, character or description whatever, for any kind of consideration whatever; or
Seeking to obtain prospective customers for application or purchase of insurance of any type, kind or character; or
Seeking to obtain subscriptions to books, magazines, periodicals, newspapers and every other type of kind of publication.