You cannot ask people to like your business page as a condition of competition entry.
You cannot ask people to tag other people on the post as a condition of competition entry.
You cannot ask people to share the post as a condition of competition entry.
The only conditions of entry you can apply are to ask people to like the competition post and/or ask them to comment on the competition post.
You must specify a clear end date and time for the competition.
Competition winners must be announced on the original competition post, even if you choose to publish on your own Facebook Page or website as well.
The following Facebook disclaimer MUST be included on all competition posts – “By entering this contest, you agree to a complete release of Facebook from any or all liability in connection with this contest. This promotion is no way sponsored, endorsed or administered by, or associated with Facebook.”