Annette McGavigan, 14, was shot dead during rioting in Derry in September 1971.
To date, no one has ever been convicted over her death.
A former British soldier was questioned under caution last September as part of the investigation by the PSNI’s Legacy Investigation Branch.
BBC News NI has reported that the PSNI has now confirmed that a file was submitted to the PPS on Tuesday, February 6.
A solicitor for the McGavigan family said that a legal letter had also been issued to the PPS calling for a decision on prosecution before the end of March.
The UK’s controversial Troubles Legacy Act became law in September, despite opposition from Stormont’s political parties and victims’ groups.
It offers a conditional amnesty and ends future civil litigation and inquests into deaths which occurred during more than 30 years of violence during the Troubles.
Under the Act, prosecutions that are currently ongoing will continue to conclusion.
Any case after the May 1 deadline would become the responsibility of a new body set up to investigate Troubles-related killings – the Independent Commission for Reconciliation and Information Recovery. (ICRIR).
A number of legal challenges have been brought by victims’ groups and families of people who were killed or injured during the Troubles.
The Irish government is separately also taking a case against the UK at the European Court of Human Rights in Strasbourg.
The British government has repeatedly stated the Act is human rights compliant.
In February, at the High Court in Belfast, Mr Justice Colton ruled conditional immunity from prosecutions for Troubles-era crime was in breach of the European Convention on Human Rights.
The McGavigan family have called for the PPS to make a decision in their case as soon as possible.
The PPS, in a statement to BBC News NI, has confirmed that the file was submitted by the PSNI last month and it has now been allocated to a senior public prosecutor for consideration.
A PPS spokesperson said that a decision will be issued “as soon as possible after a thorough consideration of all evidence”.
Tags: