Law 41 of the Laws of Cricket covers unfair play. This law has developed and expanded over time as various incidents of real life unfair play have been legislated against. The first section of Law 41 makes clear that the captains of the two teams have the responsibility for ensuring that play is conducted according to the spirit and traditions of the game, as well as within its Laws. This leads to a statement that the umpires are the sole judges of fair and unfair play. It contains an override of the Laws of Cricket: if either umpire considers an action that is not covered by the laws to be unfair, he can intervene and call the ball dead. Fair and unfair play can also refer simply to conventions of the game that are often seen to conform with the Spirit of Cricket. Ball tampering The state of the ball affects deliveries to a batsman. Even a new cricket ball is not perfectly spherical, but in two parts stitched together to form a seam. How a ball moves depends in part on how much air resistance there is to different parts of the ball, and therefore to what degree the ball has deteriorated. A cricket team will normally seek, for example, to polish one side of the ball and rough up the other side. The resulting variation in air resistance on the ball can have a marked effect. Ball tampering has always been a feature of the sport. Players would use objects to rough up one side of the ball, and use resins and substances like Brylcreem to shine the other. This sort of ball tampering is against the spirit of the game and has always been against the rules. Despite this, it has always gone on with limited sanction, and it can be difficult to spot. The television age has meant that from the 1990s onwards most international games have been televised. Slow motion replays have highlighted a number of incidents of ball tampering: some of which have been widely reported in the press (such as with the Sandpapergate incident). The third section of Law 41 contains the rules and sanctions against ball tampering and requires the umpires to make frequent and irregular inspections of the ball to counter it. It also contains punitive measures against fielders who do tamper with the ball. Match suspensions may be implemented. Some