2016/6 An employee’s salary may be above the equal treatment standards if there is a material reason (CZ)
The employer may unilaterally stipulate or agree a salary with an employee that goes beyond the equal treatment standards, to the employee’s benefit if there is a material reason. The reason must either represent a competitive advantage compared to other employees, or the unequal treatment must be a substantial requirement necessary for the particular work.
Nejvyssi soud (Supreme Court), 2015-08-06