Endowment land cannot, at the same time, be used as another
Bahá'í institution such as Haziratu'l-Quds or a Teaching Institute. There is no
objection to erecting a temporary structure on endowment land for the
convenience of friends who may visit it or have gatherings there provided that
if its used becomes of a permanent nature it would be necessary to acquire a
new Endowment."
- The Universal House of Justice (From a letter to a
National Spiritual Assembly, August 30, 1971; compilation: ‘Lights of
Guidance’)