According to the legislation, the employer must notify the employee

No, the manager's duty to notify about a change in working conditions is defined in Part 3 of Article 32 of the Labor Code.

In accordance with part 3 of article 32 of the Labor Code, in connection with changes in the organization of production and work, a change in essential working conditions is allowed while continuing to work in the same specialty, qualification or position. The employee must be notified no later than two months of changes in essential working conditions - pay systems and amounts, benefits, work regime, establishment or cancellation of part-time working hours, combination of professions, change in grades and job titles, etc.