Nowadays they r not following this rule. It depends on their mood also and ur vasta .
Residence Visa Information
Employment / Residence Visa for Dubai, Abu Dhabi and Sharjah
The Employment Visa is required on landing a job in the UAE, and is usually arranged by the employers. The formalities for obtaining the visa are fulfilled by them. The visa entitles him to be a resident in the UAE for a 3-year period and can be renewed thereafter. The employee can also arrive on a visit visa and convert it to employment or residence visa on fulfilling certain conditions.
Except for GCC citizens and UAE nationals, other nationalities will have to obtain Residence Visa to legally live in UAE. For most expatriates, the company that employs them will sponsor them for a UAE Residency Visa, along with a labour card or work permit. Residence Visa is a must to open a bank account, to obtain a driving license, register for a car and so on.
Types of Residence Visas:
Employment Visa
Employee residence visa used by majority of expatriates, wherein the employer takes care of all the paper work.
Family Residence Visa
Eligibility to sponsor spouse and children. The minimum salary requirement for residence visa sponsorship of family members is Dh.10,000 per month and the sponsor must have own accommodation (not shared).