Work permit issued under this category is specific to the employer. In order to change the employer, the employee has to receive approval from the ESDC.
LMIA( Labour Market Impact Assessment) is a written request to ESDC for an exception from hiring a Canadian citizen or permanent resident. The employer has to submit evidence, that he was looking for a local candidate and he was not able to find one(advertisement requirement for at least 4 weeks). The ESDC officer will consider the impact on the Canadian labor market and several other factors. A positive or neutral LMIA allows a foreign national to obtain a work permit.
In some cases, a work permit might be exempt from the advertising requirements. Such as owner-operator, LMIA based. Some LMIA has various requirements for an advertisement:
There is a list of occupations, for which no LMIA will be issued:
If you did not fall under the category of the LMIA exempt candidates, you will need a positive LMIA in order to accept a job offer.
For information: https://www.canada.ca/en/employment-social-development/services/foreign-workers.html
Bellow is a special stream, which allows shorter than usual processing of LMIA:
Global Talent Stream- no advertisement required, short processing time.
A very special stream, allowing to apply for LMIA and receive a decision within a very short period of time (2-4 weeks).
You may be eligible for Category A of the Global Talent Stream if you have been referred to the Global Talent Stream by one of the Stream's designated partners and you are hiring unique and specialized talent. https://www.canada.ca/en/employment-social-development/services/foreign-workers/global-talent/requirements.html#h13
You may be eligible for Category B of the Global Talent Stream if you are seeking to hire highly-skilled foreign workers to fill positions in occupations found on the Global Talent Occupations List. A referral is not required to be eligible for Category B. https://www.canada.ca/en/employment-social-development/services/foreign-workers/global-talent/requirements.html#gtol
A labor Market Benefits Plan must be submitted, no advertising requirement