Everything that has been said above applies in general to both companies and LLPs. The information below, however, is exclusively specific to LLPs.
A PSC is an individual who meets any one or more of the following conditions in relation to an LLP:
PSC conditions for Limited Liability Partnerships  PSC conditionWhat you need to check (i)Directly or indirectly holding rights over more than 25% of the surplus assets on a winding upLLP Agreement. The agreement might be written down but need not be. The agreement might be explicit and obvious or it might be implicit and arise from the way in which the LLP operates in practise. If the agreements do not specify any rights to surplus assets on winding up then you should treat the surplus assets on winding up as being split equally between the members of the LLP. You must then consider whether this means that anyone has rights to more than 25%. (ii)Directly or indirectly holding more than 25% of the voting rightsWith regard to decisions that the LLP must make through its members voting, you should consider the members’ voting rights according to any partnership or other agreement (see above). If any such agreement does not specify any voting rights then you should treat voting rights as being split equally between the members of the LLP. You must then consider whether this means that anyone has rights to more than 25%. (iii)Directly or indirectly holding the right to appoint or remove the majority of those involved in managementLLP or other agreement. Consider whether anyone has the right to appoint or remove people such that they control the majority of voting rights concerning management of the LLP. (iv)Otherwise having the right to exercise, or actually exercising, significant influence or controlA person who does not meet conditions (i) to (iii) may still have significant influence or control of your LLP.  To work out whether someone has significant influence or control of your LLP you must consider a range of factors set out in statutory guidance. (v) Holding the right to exercise, or actually exercising, significant influence or control over the activities of a trust or firm which is not a legal entity but would itself satisfy any of the first four conditions if it were an individual.If a trust or firm (without legal personality) has any ownership of control over your LLP then you must consider whether that trust or firm would meet any of conditions (i) to (iv) if it were an individual. If the trust or firm would meet any of conditions (i) to (iv) then you must consider the individuals or legal entities who control the activities of the trust or firm. To work out whether someone has significant influence or control of the trust or firm you must consider a range of factors set out in statutory guidance.
Official wordings that can be entered on an LLP’s PSC register are listed in Annex 4 to the Guidance on the register of people with significant control.