The chief executive's wife, Regina Leung Tong Ching-yee, was criticised in the legislature yesterday for using the Chief Executive Office to meet green groups.
Labour Party lawmaker Cyd Ho Sau-lan mentioned a meeting when she spoke in the Legislative Council.
Leung's meeting concerned her new company, Food for Good, which plans to redistribute leftover food to people in need.
Ho said: "It is not the CE wife's duty to handle food leftovers. It is a bad example that the CE's wife is using the government resources to handle her private matter.
"Even though Tong said she would not make a profit out of the firm, her company is still registered as a company instead of a non-profit organisation. It is not appropriate for her to be involved in the matter as the company could make a profit."
A spokesman for the Chief Executive's Office confirmed she was given a "working space" in the office to carry out her duties in charity works and to receive guests. Two environmental groups said they met Regina Leung at a reception held in her husband's office one month ago.
Lawmakers are concerned that she is using the influence of her husband and government resources to promote Food for Good.
Constitutional affairs chief Raymond Tam Chi-yuen defended Regina Leung, saying her company "did not raise a question of conflict of interest".
"As a member of the community, Mrs Leung wishes to contribute to Hong Kong.
"The project is non-profit-making in nature and she will not obtain any economic benefits from the project," he said.
He pointed out that Regina Leung had long planned to step down as director and stay on in an honorary role once Food for Good, incorporated this month, was up and running.
According to Companies Registry records, she founded Food for Good this month to redistribute leftover food from hotels, restaurants and bakeries to those in need. It will also promote policy on reducing and recycling food waste.
Friends of the Earth's chief executive Mayling Chan confirmed she and some colleagues met Regina Leung at a reception in the Chief Executive's Office about a month ago. Members of Green Power were also present.