Sharing remarketing lists and conversion tags across google ads accounts

Companies with several divisions and groups that operate in various regions will have a range of adwords accounts for business reasons like billing, etc but they will have a single website and some micro sites. 

Creating conversions and remarketing tags is tricky. If there are 100 accounts, it is not easy to have 100 remarketing tags and 100 conversion tags and audience data cannot be exchanged between all accounts. 

Ideal solution is to have a single account for creating remarketing and conversion tags and share the audience list as well as conversion tags across all accounts. 

Using a single account for tags creation will make tag management easy as well as saves all audience in one account without any duplication. Lists and tags can be shared and used across all ad accounts.

If separate tags are created for each adwords accounts, there could be duplicate events. For instance, visits to the home page, form fills from the contact us page on the website which is common for all divisions.