OPINION: Price fixing by taxi association, why CCS declined to comment?

Singapore Notes, 8 Dec 2011
In one of its rare successes in persecution, the Competition Commission of Singapore (“CCS”) issued an Infringement Decision on 23 Nov 2011 against 11 modelling agencies in Singapore for breaching the Competition Act (“the Act”). It stated for public record, "Trade or industry associations should not become the vehicle to facilitate price collusion or price-fixing."
Now put into context the action plan of the National Taxi Association (NTA), a trade union body representing some 12,000 taxi drivers, which has said it "is already in talks with other taxi companies and urges them to adjust their taxi fares as soon as possible."
So why did the CCS declined to "comment "on individual cases or whether it is investigation a case"? Could it be because ComfortDelGro's major shareholder (12.1%) is Singapore Labour Foundation? Full story