Whoever, being legally bound to attend in person or by an agent at a certain place and time in obedience to a summons, notice, order or proclamation, proceeding from any public servant legally competent, as such public servant, to issue the same, intentionally omits to attend at the place or time, or departs from the place where he is bound to attend before the time at which it is lawful for him to depart, shall be punished with imprisonment for a term which may extend to one month, or with fine which may extend to $500 , or with both; or if the summons, notice, order or proclamation is to attend in person or by agent before a court of justice, with imprisonment for a term which may extend to 6 months, or with fine which may extend to $1,000, or with both.