If a child is placed at SA+ on the SEN register, they will need an IEP/IPP. section 5 here will explain what has to be done by the school wrt supporting your child.
As nasrin says, you should have a copy of the current one and you should also be invited to attend reviews regularly.
You should also have a copy of any programmes from the SALT, so that you can continue working on targets at home.
Remember that a well written IEP will be building on previous targets and achievements, so may contain several small targets rather than one or two big ones, but if the school is on the ball, they should be constantly updating these to account for successes and further targets.
Also, whilst the idea of a 'statement' is great, in many authorities, and mine is one, the only children who are getting them now, are those for whom a special school is appropriate. The rest are staying at SA+, occasionally with a small amount of funding, but as this is not part of a statement, the LEA is under no legal obligation to continue the funding. In this authority, schools are seeing their SEN budgets cut and headteachers are having to make tough decisions about which children will receive the support because the money is having to come from the general school budget.