Iowa Code
Chapter 559 - POWER OF APPOINTMENT
Section 559.4 - Limiting release.

559.4 Limiting release.
A release of a power to appoint may also be made for life or lives or for a specified period of time.
[C50, 54, 58, 62, 66, 71, 73, 75, 77, 79, 81, §559.4]