The government said it wants to "eliminate" alternative medicine from health centres where all treatment must be given by "recognised" professionals.
"I have communicated to the head of the government my resignation."
A handful of activists protested outside the Madrid court as Vela arrived at the court in a wheelchair.
The latest arrivals come after the rescue service picked up more than 1,200 people attempting the perilous crossing from Morocco to Spain.
'We would like to host them and share with them the joy football can give, and I hope this gesture can help after the events of the last few weeks'
Events of the weekend have shown that nothing can be taken for granted
Russia beat former champions Spain to storm the quarterfinals
The hosts play their most important match in three decades when they face the 2010 champions
Spain draw with Morocco to advance to the knockout stage
The 2010 winners drew their opener 3-3 with European champions Portugal
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