(P.A. 82-469, S. 4, 11; P.A. 86-269, S. 7, 10; P.A. 89-364, S. 4, 7; P.A. 93-381, S. 9, 39; P.A. 95-257, S. 12, 21, 58; 95-268, S. 5, 11; P.A. 96-139, S. 6, 13; P.A. 97-259, S. 24, 41; 97-295, S. 8, 25; P.A. 98-262, S. 14, 22; P.A. 03-225, S. 22; P.A. 14-39, S. 62; P.A. 16-163, S. 31.) History: P.A. 82-469 effective June 11, 1982, and applicable to income years commencing on or after January 1, 1982; P.A. 86-269 increased the percentage of total investment in the establishment of certain child day care facilities allowed as a tax credit, from 30% of such total to 50%, effective June 2, 1986, and applicable to income years commencing on or after January 1, 1986, for companies investing in such programs; P.A. 89-364 deleted references to repealed sections and added the reference to Sec. 17-613, effective July 1, 1989, and applicable to income years of corporations commencing on or after January 1, 1990; P.A. 93-381 replaced commissioner of health services with commissioner of public health and addiction services, effective July 1, 1993; P.A. 95-257 replaced Commissioner and Department of Public Health and Addiction Services with Commissioner and Department of Public Health, effective July 1, 1995; P.A. 95-268 deleted chapter 212a from the chapters which provide for taxes which may be granted a credit and lowered the amount of credit granted from 50% of the total amount invested to 40% of the total cash amount invested, effective July 6, 1995; P.A. 96-139 changed reference to Sec. 17b-743 to Sec. 17b-740, effective May 29, 1996; P.A. 97-259 increased the amount of the allowable tax credit from $10,000 to $50,000, effective July 1, 1997, and applicable to income years commencing on or after January 1, 1998; P.A. 97-295 changed reference from Subsec. (c) of Sec. 17b-740 to Sec. 12-217x, effective July 8, 1997, and applicable to income years commencing on or after January 1, 1998; P.A. 98-262 revised effective date of P.A. 97-295 to delete conflicting applicability provision; P.A. 03-225 increased the amount of the credit from 40% to 60% of the amount invested, effective July 1, 2003, and applicable to income years commencing on or after January 1, 2003; P.A. 14-39 replaced reference to Commissioner of Public Health with reference to Commissioner of Early Childhood, effective July 1, 2014; P.A. 16-163 replaced references to child day care facility with references to child care center and replaced references to child day care with references to child care services, effective June 9, 2016.