this is old but i just saw it. fwiw, the executive order states that the policy is to:
secure the southern border of the United States through the immediate construction of a physical wall on the southern border, monitored and supported by adequate personnel so as to prevent illegal immigration, drug and human trafficking, and acts of terrorism;
i dont think "implication" is the right word for that. saying that the border will be secured by a physical wall is pretty much saying it has to extend all the way. thats how you would interpret that statement as an attorney, yes? otherwise nothing will be secured. yet another problem with walls.