The tier group uses a Fixed Model with a one-year period and a Qualifying Points (QP) reset date of December 31. The key setting is "Extend Expiration for this tier group is Qualifying Points Reset Date."

For a fixed-model tier group, when a member is upgraded, their new tier is valid for the remainder of the current tier assessment period plus the entire next tier assessment period.

The member was upgraded on March 16, 2023.

- The current assessment period is January 1, 2023, to December 31, 2023.

- The next assessment period is January 1, 2024, to December 31, 2024.

Therefore, the member's new Gold tier will expire at the end of the next full assessment period, which is December 31, 2024.

A. December 31, 2023: This is the end of the current assessment period. The member's tier is valid for the next full period as well, not just the current one.

B. March 16, 2024: This date is one year from the upgrade date, which is the logic for an Anniversary Model tier group, not the Fixed Model specified in the scenario.

D. March 31, 2024: This date does not align with the program's annual reset date of December 31 and is not consistent with any standard tier expiration logic.

1. Salesforce Help, Loyalty Management, "How Tier Expiration Works": This document explicitly states, "For a fixed-model tier group, when a member is upgraded to a higher tier, the member’s new tier is valid for the remainder of the current tier assessment period and the entire next tier assessment period." This directly supports the calculation that leads to the December 31, 2024 expiration date.

2. Salesforce Help, Loyalty Management, "Tier Management": This guide details the setup of Tier Groups. It describes the "Tier Model" field, where administrators choose between "Fixed" and "Anniversary". The scenario's use of a "Fixed Model" with a specific reset date (December 31) is central to the correct answer, distinguishing it from anniversary-based calculations.

3. Salesforce Help, Loyalty Management, "Create a Tier Group": In the section detailing the fields for a tier group, it explains the "Tier Period" and "Qualifying Points Reset Frequency". The combination of a one-year period and a fixed reset date (Dec 31) establishes the fixed assessment periods (Jan 1 - Dec 31) used in the expiration calculation.