Tenure is a statutory right controlled by law. The tribunals that concluded petitioner suffered no deprivation of her tenure rights engaged in legal error by labeling the position as “extracurricular” and then short-circuiting the requisite analysis based on that classification. This instructional and tenure-eligible position did not become extracurricular and tenure ineligible simply because petitioner already held tenure in another position. Petitioner met the statutory criteria for tenure and is entitled to a remedy for the violation of her right not to be removed or reduced in salary while protected by tenure for her work in the BookBinders program.