If the other methods do not produce effective regulation then you are bound to go for licensing.

They are not effective because they are not currently used by local authorities, who prefer PELs as they then get both control and revenue, so no one really knows if they are effective against noise, or not

But the law relating to noise is not an effective control for (for example) juke box noise emanating from pubs.

This is crazy reasoning, because it is not used and as there is currently running alongside entertainment licensing which actually legalises some noise and legally exempts others (i.e. juke box noise), as the Bill will just continue to do.

Control of excess noise by licensing it is never necesary. When it proves to be necesary, the laws to protect the public from damage from exessive noise should be enforced or improved. For example this Bill gives me no protection from my neighbours noisy firework displays as this excessive noise, is not covered.

Large gatherings, like Glastonbury may require special measures to ensure the public's safety but these should only 'kick-in' when a specified number of people are catered for, rather blanket licensing and exemptions for events for less than 250.