Hi aspirant

There is no such provision yet in any Article/Rule made by any state government.

You can take admission or do a job in other state only as a general candidate .

You will be cosidered as SC candidate in other state only if you are applying in central examination like JEE .

Also your certificate is only valid if it is in proper format.

Check B.tech admission process of all state this year here: https://engineering.careers360.com/articles/btech-admissions-for-other-state-candidates

Hope this was helpful.