The PST Portal is a tool used by the Select Committee on Ethics to process privately sponsored travel requests from Senate Members, officers, and employees.

Privately sponsored travel is any gift of travel and travel-related expenses for travel outside the Senate duty station, including transportation, lodging, food and refreshments, and conference fees and materials, whether paid for directly, reimbursed, or provided directly, from a private individual or entity, in connection with a Member's, officer's, or employee's official Senate duties. Incorporating reforms from the Honest Leadership and Open Government Act of 2007 (HLOGA), Pub. L. 110–81 (2007), Senate Rule 35.2 permits Members, officers, and employees to accept privately sponsored travel only with the prior written approval of the Committee.

The Committee's approval process is governed by the Regulations and Guidelines for Privately Sponsored Travel (Travel Regulations). The Travel Regulations contain detailed requirements regarding who may sponsor travel; time limits for trips; and the type and amount of expenses that can be reimbursed. In order to obtain Committee approval, Members, officers, and employees must submit a complete travel package to the Committee no later than 30 days prior to the departure date of a proposed trip. To determine the due date for travel packages, please use the Travel Calculator.