Are you require to wear interviews attire or warehouse ready, for your interview?

Yes

I work at UPS. Wear a nice shirt, jeans, and tennis shoes but make sure it's NICE casual wear. There's no need to wear a suit or tie...

It never matters who you are interviewing with or what the job is, always dress nicely, sit up straight and use your best language skills as you make eye contact with the interviewer.

No just dres casual or if you could go with working boots n ready too work👍

For the first interview, you can come casual. Just not that casual. If you want to wear business attire you can too. Its the first interview of three.