haversian spaces-spaces in bone formed by the enlargement of haversian canals. haversian system-a central canal containing capillaries and the concentric osseous lamellae around it occurring in compact bone.
Any donation to a political party, campaign, or action committee is non-deductible. Other non-deductible contributions are those to individual people, labor unions, business associations, for-profit schools, for-profit hospitals, foreign governments, and fees paid to associations or state or municipal governments.
501(c)4âs have the ability to be far more political than 501(c)3âsâthough politics cannot be the primary function of a 501(c)4. And while donations to 501(c)4âs are NOT tax-deductable, they are not regulated in the same way donations to a 527 are. While the 501(c)4 existed for years in this hybrid state, it appears that for most of its history, few organizations exploited the designationâs political potential.