A “central organization” can add or subtract subordinates annually from the group of organizations it certifies to the IRS as qualified for exempt status
Private foundations may make grants to groups which are not public charities if they exercise "expenditure responsibility" in approving, monitoring grants
Private foundations may be subject to tax if they and their disqualified persons hold too much stock in a business functionally unrelated to the purpose of the foundation
Organizations which are not publicly supported but use most of their assets and income in the active conduct of their charitable activities avoid some private foundation limitations.
If foundations are going out of business, they may distribute their assets to certain public charities; if they want to continue, they might become publicly supported themselves
The process of thinking through the preliminary questions is critical for obtaining legal and public approval and benefiting the community after the sale of charitable assets.