Posted: 17/02/2014 at 00:49
Answering all your questions on this topic would make for very lengthy post as the claim status rules are pretty complicated, So I shall refer you to this link for Welsh athletics: http://www.welshathletics.org/athletes/athlete-transfers--forms.aspx . You don't need to wait until membership renewal time to change clubs, you can do it at any time of the year BUT according to England athletics' rules at least before submitting the form you must first formally resign from your previous first-claim club and gain a club official's 'approval' so to speak. So if you want to switch to second-claim,you may have to re-join that club with a different claim status. Often if the clubs are in a similar geographical area may be more hassle than its worth - may i ask why you wish to change your 1st claim?
As for competition, yo must represent your fist claim club in all disciplines to which it is affiliated to the Welsh athletics, eg. if Club A 1st claim is affiliated for xc,track and road you must represent them in those races but can represent club B in a fell race,if that club is affiliated to fell. I don't think they are too fussed about parkruns. Low-key local or road races may turn a blind eye but you need to be aware of this rule all the same; often only first-claim club runners are eligible for team awards for example. Unfortunately unless you race a lot on the fells 2nd claim often doesn't offer very much except extra training opportunities.Hope this helps!