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Essence; the material or necessary component of something.

A matter of substance, as distinguished from a matter of form, with respect to pleadings, affidavits, indictments, and other legal instruments, entails the essential sufficiency, validity, or merits of the instrument, as opposed to its method or style.

West's Encyclopedia of American Law, edition 2. Copyright 2008 The Gale Group, Inc. All rights reserved.

SUBSTANCE, evidence. That which is essential; it is used in opposition to form.
     2. It is a general rule, that on any issue it is sufficient to prove the substance of the issue. For example, in a case where the defendant pleaded payment of the principal sum and all interest due, and it appeared in evidence that a gross sum was paid, not amounting to the full interest, but accepted by the plaintiff as full payment, the proof was held to be sufficient. 2 Str. 690; 1 Phil. Ev. 161.

A Law Dictionary, Adapted to the Constitution and Laws of the United States. By John Bouvier. Published 1856.
References in periodicals archive ?
Against the background of reports of a rise in psychoactive substance use, particularly among adolescents, the United Nations International Drug Control Program (UNDCP) and the World Health Organization (WHO) initiated the Global Initiative (1999-2003) for the primary prevention of psychoactive substance use among young people (World Health Organization, 2007; United Nations International Drug Control Program 1999).
Similarly, of the 1,253 men and 2,047 women in the study who had at least one anxiety or depressive disorder, 40% of men and 52% of women used health care only to address their symptoms; 13% of men and 6% of women used health care and psychoactive substances; and 4% of men and 1% of women used only psychoactive substances, according to Dr.
"Following a search of the house, a quantity of what is believed to be Class A drugs and psychoactive substances were found in a child's bedroom.
The Prevention of and Treatment for Substance Abuse Act 70 of 2008 speaks to The National Drug Master Plan, which emphasises all three of these strategies for combating the abuse of alcohol, tobacco, cannabis and other psychoactive substances.
She said: "Novel psychoactive substances cause misery especially to young people who, in large numbers, are encouraged to try them out by the fact that they are not against the law.
Indeed, indications of a comparatively high level of psychoactive substance use and trafficking in illicit substances in both sites influenced the decision to include these sites in the Global Initiative.
He added: "The investigation also identified Mr Griffiths's probable use of new psychoactive substances at Parc and their possible impact on his mental health.
The Psychoactive Substances Act (2016) has been developed to curtail the use and supply of legal highs.
Director for HMP Parc, Janet Wallsgrove, said: "These figures show the scale of the challenge that is faced by my team at Parc and the success of the proactive steps taken to detect and seize new psychoactive substances inside the prison.
A blanket ban on all new psychoactive substances came into force in May 2016 -- criminalising the production, distribution, sale and supply of the drugs.
The judge threw out the case after claiming that nitrous oxide isn't actually covered by the Psychoactive Substances Act, which technically meant the substance was still legal to use.
All the participants admitted to having used a psychoactive substance at one point in their life since their being on the streets.