LTPT - eligibility period

An over age 21 employee is hired 3/1/23 and works between 501-999 hours in the 12 months after her initial date of hire.  She then works between 501-999 in calendar year 2024.  

Lets say she reached 501 hours on June 1, 2024.  Am I correct then that her LTPT plan entry date is 1/1/25 and not 12/1/24 (6 months later) since not only is the LTPT eligibility period 12 months but if she goes over 1000 hours later in 2024, she would be eligible to enter as a "regular" participant on 1/1/25 and would not classify as a LTPT?

Thank you

I agree.

P.S. - for the record, my answer assumed eligibility computation period switched to plan year, as per C.B.'s comment.

Does the plan use the rule to switch the eligibility computation period to the plan year?

Yes, the plan does switch to calendar year after initial eligibility period.