To satisfy the requirements of the NASAA brochure delivery rule, customers who wish to buy advisory services must receive a copy of the brochure:

To satisfy the requirements of the NASAA brochure delivery rule, customers who wish to buy advisory services must receive a copy of the brochure at least 48 hours

Explanation:

To satisfy the requirements of the NASAA brochure delivery rule, customers who wish to buy advisory services must receive a copy of the brochure at least 48 hours that is at least 2 days before entering into an advisory contract. A potential customer needs to be given the disclosure document at least 2days  before entering into an advisory contract which can be either in a written form or an oral contract.