Utilize the input text as a context reference, choose the right relationship between Jennifer Westacott and Business Council of Australia from the options. Options: product/material produced, manufacturer, distributed by, industry, position held, original broadcaster, owned by, founded by, distribution format, headquarters location, stock exchange, currency, parent organization, chief executive officer, director/manager, owner of, operator, member of, employer, chairperson, platform, subsidiary, legal form, publisher, developer, brand, business division, location of formation, creator.

"Australia has some of the toughest tax integrity measures in the world," Business Council of Australia chief executive Jennifer Westacott said.

Answer: employer