Bikes are demanded to have:
a working brake,
And when riding in the dark:
a white light at the front,
a red light & reflector at the back (can be one combined item),
amber reflectors on both sides of the pedals,
reflective stripes on the tyres, or wheel rims.
There are hardly ever any checks done on these last demands*, just be sure to carry working lights.
except for some places where the police force is training new staff, like I happen to live in.