public Card_PT getLatestPT() {
    	Card_PT latestPT = new Card_PT(-1,-1,0);
    	long max = 0;
    	
    	for (Card_PT pt : newPT) {
    		if (pt.getTimestamp() >= max) {
    			max = pt.getTimestamp();
    			latestPT = pt;
    		}
    	}
    	
    	return latestPT;
    }