Ok - you are getting a bit past my pay grade (though I could check with my Real Estate Family which includes RE Agents and lawyers): By general law any RE Agent is a "transactional" broker.
If I sell my house it is almost traditional to ask my agent to be a "Sales Agent" - and when I do this they represent me and me alone! I have purchased homes and asked my agent to be a Purchase Broker to represent my interests solely.
I got this from a friend:
Florida law requires that real estate licensees operating as transactional
brokers disclose to buyers and sellers their role and duties in providing a
limited form of representation, as a transaction broker. xxxxxxx
provides to you a limited form of representation that includes
the following duties:
1) Dealing honestly and fairly,
2) Accounting for all funds,
3) Using skill, care, and diligence in the transaction,
4) Disclosing all known facts that materially affect the value of
residential real property and are not observable to buyer,
5) Presenting all offers and counteroffers in a timely manner, unless a
party has previously directed the licensee otherwise in writing.
6) Limited confidentiality, unless waived in writing by a party. This
limited confidentiality will prevent disclosure that the seller will
accept a price less than the asking or listing price, that the buyer will
pay a price greater than the price submitted in a written offer, of the
motivation of any party for selling or buying property, that a seller or
buyer agrees to financing terms other than those offered, or of any
other information requested by a party to remain confidential, and
7) Any additional duties that are entered into by this or by separate
written agreement.
Limited representation means that a buyer or seller is not responsible for the
acts of the licensee. Additionally, parties are giving up their rights to the
undivided loyalty. This aspect of limited representation allows a licensee to
facilitate a real transaction by assisting both the buyer and the seller, but a
licensee will not work to represent one party to the detriment of the other
party when acting as a transaction broker to both parties.
In the case of the TSS (or their competitors) they do not declare and are a transactional broker by de facto (according to Fla Law) unless asked otherwise by either party.