How to ensure quality of eggs?

A video showing maggots in trays of eggs at Giant's Tampines Hypermarket prompted an investigation by the supermarket chain.
A video showing maggots in trays of eggs at Giant's Tampines Hypermarket prompted an investigation by the supermarket chain.SCREENGRABS: FACEBOOK/LEONARD TANG

Eggs sold at local supermarkets are packed in unsealed transparent containers with the expiry date on the packaging (Giant lodges report with supplier over worms seen in egg trays at Tampines Hypermarket; ST Online, Feb 12).

The brand name is printed on the egg shells, but not the expiry date.

With the eggs in unsealed containers, how can business entities and consumers be protected if there are quality issues?

Also, eggs sold at wet markets do not come with information on expiry dates, so how can consumers be assured of the quality of these eggs?

Are there any regulations on this issue and checks for adherence?

Ang Hak Heng