The Limited Agency Consent Agreement is required by the state whenever both the Buyer and Seller are represented by the same Principal Broker. It is most common when there are two agents within the same office with each representing a specific party and the Principal Broker representing both parties in a limited capacity. The form states "Signature of Authorized Agent or Broker" for the signature of the company.
As an agent at KW South Valley Keller Williams you are an authorized agent to sign this document even if you only represent one of the two parties.
The main thing to remember is the Limited Agency Consent Agreement must be signed by the Buyer before he/she signs the offer and it must be signed by the Seller before he/she reviews the offer.