订立和变更劳动合同应当遵循平等自愿、协商一致的原则，不得违反法律、行政法规的规定。
Conclude and change labor contract to ought to abide by equality freewill, negotiate consistent principle, do not get the provision of lawbreaking, administrative regulations.
第六条供电企业和用户应当根据平等自愿、协商一致的原则签订供用电合同。
Article 6 Both power suppliers and users shall, under the principle of equality, volition and consensus through consultations, sign contracts on the supply and consumption of electric power.
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