Adjudged that the determination is confirmed, the petition is denied, and the proceeding is dismissed, with one bill of costs.
Judicial review of an administrative determination made after a hearing required by law, and at which evidence was taken, is limited to whether that determination is supported by substantial evidence ( see Matter of Jennings v New York State Off. of Mental Health, 90 NY2d 227, 239; Matter of Superior Officers Assn. of Police Dept. of County of Nassau, Inc. v State of N.Y. Pub. Empl. Relations Bd., 23 AD3d 481, 482). Substantial evidence has been defined as "such relevant proof as a reasonable mind may accept as adequate to support a conclusion or ultimate fact" ( 300 Gramatan Ave. Assoc., v State Div. of Human Rights, 45 NY2d 176, 180).
In the instant case, substantial evidence supports the findings of the State of New York Public Employment Relations Board (hereinafter PERB) that the petitioner's improper practice charge against his union was untimely filed ( see 4 NYCRR 204.1 [a] [1]) and, in any event, without merit ( see Civil Service Law § 209-a [c]; Matter of Garvin v New York State Pub. Empl. Relations Bd., 168 AD2d 446, 446-447). Accordingly, PERB's determination to dismiss that charge must be confirmed.
The petitioner's remaining contentions are without merit.