(a) "autism " means a condition of uneven skill development primarily affecting the communication and social abilities of a person, marked by repetitive and ritualistic behaviour;

(b) "Board " means Board of trustees constituted under section 3;

(c) "cerebral palsy " means a group of non-progressive conditions of a person characterised by abnormal motor control posture resulting from brain insult or injuries occurring in the pre-natal, peri-natal or infant period of development;

(d) "Chairperson " means the Chairperson of the Board appointed under clause (a) of sub-section (4) of section 3;

(e) "Chief Executive Officer " means the Chief Executive Officer appointed under sub-section (1) of section 8;

(f) "Member " means a Member of the Board and includes the Chairperson;

(g) "mental retardation " means a condition of arrested or incomplete development of mind of a person which is specially characterised by sub-normality of intelligence;

(h) "multiple disabilities " means a combination of two or more disabilities as defined in clause (i) of section 2 of the Persons with Disabilities (Equal Opportunities, Protection of Rights and Full Participation) Act, 1995 (1 of 1996);

(i) "notification " means a notification published in the Official Gazette;

(j) "person with disability " means a person suffering from any of the conditions relating to autism, cerebral palsy, mental retardation or a combination of any two or more of such conditions and includes a person suffering from severe multiple disability;

(k) "prescribed " means prescribed by rules made under this Act;

(l) "professional " means a person who is having special expertise in a field which would promote the welfare of persons with disability;

(m) "registered organisation " means an association of persons with disability or an association of parents of persons with disability or a voluntary organisation, as the case may be, registered under section 12;

(n) "regulations " means the regulations made by the Board under this Act;

(o) "severe disability " means disability with eighty per cent or more of one or more of multiple disabilities;

(p) "Trust " means the National Trust for Welfare of Persons with Autism, Cerebral Palsy, Mental Retardation and Multiple Disability constituted under sub-section (1) of section 3.