Judgment_paragraph 30 · Margarita Isabel Vega González v Consejería de Hacienda y Sector Público del gobierno del Principado de Asturias (C-158/16)

30With regard to the concept of ‘employment conditions’ within the meaning of Clause 4(1) of the framework agreement, the Court has already held that the decisive criterion for determining whether a measure falls within the scope of that concept is, precisely, the criterion of employment, that is to say the employment relationship between a worker and his employer (judgments of 12 December 2013, Carratù, C‑361/12, EU:C:2013:830, paragraph 35; of 13 March 2014, Nierodzik, C‑38/13, EU:C:2014:152, paragraph 25; of 14 September 2016, de Diego Porras, C‑596/14, EU:C:2016:683, paragraph 26; and order of 9 February 2017, Rodrigo Sanz, C‑443/16, EU:C:2017:109, paragraph 32).