An Australian Bricklayer skills assessment is required so that you, the migrant, can apply for an Australian Visa. This is the way Australian Immigration can gauge if you are in fact a Bricklayer under the Australian guidelines.
Many people want to immigrate to Australia as a Bricklayer but without a skills assessment delivered by an approved assessing body, Australian Immigration have no way in checking a migrant has the necessary skills. To emigrate to Australia as a Bricklayer you will need to complete the Bricklayer skills assessment for a skilled visa.