Please elaborate activities performed "for work?"
This response is general in nature and cannot be construed as legal advice, given that not enough facts are known. Any comments offered on Avvo are of a general nature only, and are not meant to create an attorney-client relationship. You are encouraged to seek independent and private counseling for a complete review of your case.
There is no specific "interval" required.
Mr. Shusterman's (former INS Trial Attorney, 1976-82) response to your question is general in nature, as not all the facts are known to him. You should retain an attorney experienced in immigration law to review all the facts in your case in order to receive advice specific to your case. Mr. Shusterman's statement above does not create an attorney/client relationship.
While there is no specific bright line "interval", one must be cautious and use logic, to avoid being perceived as "spending more time in the USA than in one's own country."
Be careful with "work" while on a B-1, even if allegedly continued to be compensated from abroad.
Kindly be advised that the answer above is only general in nature cannot be construed as legal advice, given that not enough facts are known. It is your responsibility to retain a lawyer to analyze the facts specific to your particular situation in order to give you specific advice. Specific answers will require cognizance of all pertinent facts about your case. Any answers offered on Avvo are of a general nature only, and are not meant to create an attorney-client relationship.
There is no set interval. CBP will look for "Trend" and "Intended purpose of visit". If they determine that you are using your B-1 in lieu of work visa, then they could refuse you entry, So you may be able to come in Feb 2015, but may not be able to do this for very long.
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