Final answer:
An IA Firm contacting a customer vacationing in another state would primarily risk violating state-specific regulations due to the differing jurisdictional laws related to trade and commerce. While federal trade laws could also potentially be implicated, it's less likely that contacting a customer would impact customer trust or concern international treaties.
Step-by-step explanation:
An IA Firm with no office in a state contacting an existing customer vacationing in that state might primarily violate state-specific regulations. These regulations are established by member state governments who rely on various organizations to enforce the rules that govern domestic and international trade. With the complexities of maintaining compliance across state lines, firms must be cognizant of the jurisdictional laws that might impact their ability to conduct business with clients on vacation in these states.
It is important to note that while an IA Firm operating across state borders could potentially violate federal trade laws, particularly if the actions contravene federal statutes that restrict certain business activities across state lines, contacting an existing customer would typically not be related to customer trust or international treaties, unless the communication itself included elements or agreements that pertain to international trade.